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#282641 - 04/09/09 02:41 PM Stage V 440 to Hemi conversion heads
Mad_Scientist Offline
enthusiast

Registered: 03/21/05
Posts: 322
Loc: Itasca, Texas
How many people have these heads and what did you have to do to your block to make them fit? Is it feasible to make the modifications to an assembled short block, or are we talking major machine work? How was the pricing? Would I just be better off to buy a crate Hemi?

Current setup is a mild 440 that is set up for street use, but I really want a Hemi instead.

Stage V
_________________________
69 Super Bee 440 5-speed
70 Dart Swinger 340 4-speed
69 Camaro SS 396 4-speed
66 Cutlass Convertilbe
70 Judge Ram Air III 4-speed
68 F-100 SWB

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#282642 - 04/09/09 03:00 PM Re: Stage V 440 to Hemi conversion heads [Re: Mad_Scientist]
JohnRR Offline
I Win

Registered: 01/20/03
Posts: 71241
Loc: U.S.S.A.
Quote:

How many people have these heads and what did you have to do to your block to make them fit? Is it feasible to make the modifications to an assembled short block, or are we talking major machine work? How was the pricing? Would I just be better off to buy a crate Hemi?

Current setup is a mild 440 that is set up for street use, but I really want a Hemi instead.

Stage V




I don't think you can even get those heads new anymore , when they first came out they were about 5k with the rocker system and that was a decade or so ago and when hemi blocks were hard to find .

build a hemi .

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#282643 - 04/09/09 05:33 PM Re: Stage V 440 to Hemi conversion heads [Re: JohnRR]
Ply72rr Offline
mopar

Registered: 01/22/08
Posts: 427
Loc: DE
I didn't think they were available any more either but they are listed on the web site.I believe you had to run external oil lines with them.I think I would go with a crate or custom built hemi myself.Check with Stage V on price and then decide.

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#282644 - 04/09/09 06:19 PM Re: Stage V 440 to Hemi conversion heads [Re: Ply72rr]
Blakcharger440 Offline
top fuel

Registered: 01/20/03
Posts: 2388
Loc: Wichita,KS
I could never get ahold of them before i started building my stroker wedge.

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#282645 - 04/09/09 06:31 PM Re: Stage V 440 to Hemi conversion heads [Re: Blakcharger440]
Mopar_Rich Offline
pro stock

Registered: 01/22/03
Posts: 1522
Loc: Sonora CA
The conversion heads ARE available. I talk to Eric all the time and I just bought a set for a customer a few months back. They require special rocker arms and the block has to be ground for pushrod clearance. It's not something you can do after the fact.

I have done a few of these and I spec a custom cam too because the exhaust rocker ratio is only 1.4:1.

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#282646 - 04/09/09 06:54 PM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
Dragula Offline


Registered: 05/02/04
Posts: 8965
Loc: Taxes R-US, NY
Quote:

The conversion heads ARE available. I talk to Eric all the time and I just bought a set for a customer a few months back. They require special rocker arms and the block has to be ground for pushrod clearance. It's not something you can do after the fact.

I have done a few of these and I spec a custom cam too because the exhaust rocker ratio is only 1.4:1.




I would take a set for the right price...My engine guy built an engine with a set a while back, and they make the Hp as they claim they do, but as stated, the block needs some pretty serious work to it.
_________________________
2013 Champion Nostalgia Mod Gas Winner '71 Duster Pump Gas 512RB Indy EZ1 heads Fastest Pass 9.81/6.14 1.32 60ft 135.97mph '70 Cuda Pro street 484 Hemi, Originally 440-6 4-speed N96 Now going 605 all aluminum Hemi, stay tuned

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#282647 - 04/09/09 08:43 PM Re: Stage V 440 to Hemi conversion heads [Re: Mad_Scientist]
Triggerfish Offline
top fuel

Registered: 07/25/05
Posts: 1692
Loc: Reno, Nevada

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#282648 - 04/10/09 06:45 AM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
JohnRR Offline
I Win

Registered: 01/20/03
Posts: 71241
Loc: U.S.S.A.
Quote:

The conversion heads ARE available. I talk to Eric all the time and I just bought a set for a customer a few months back. They require special rocker arms and the block has to be ground for pushrod clearance. It's not something you can do after the fact.

I have done a few of these and I spec a custom cam too because the exhaust rocker ratio is only 1.4:1.




Over the last year ... maybe 2 ... or so I have seen threads were people asked about these heads and the replies were that there weren't any available at the time and there was no plan in the near future to run them because they were busy making heads for real hemi blocks .

SORRY ...

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#282649 - 04/10/09 07:38 AM Re: Stage V 440 to Hemi conversion heads [Re: JohnRR]
Mopar_Rich Offline
pro stock

Registered: 01/22/03
Posts: 1522
Loc: Sonora CA
Eric sent me an email LAST NIGHT. He will have the castings in stock by next week. The rocker system is different, as I said, but he has those in stock now. I see no reason for a delay - at least not now. Here's his email to me:

Hello Rich:
The conversion head castings are supposed to arrive at our shop next week. We will run them through immediately. Rocker assemblies I already have.

Thanks
Eric

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#282650 - 04/10/09 08:33 AM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
Mopar Ron Offline
master

Registered: 01/20/03
Posts: 7902
Loc: Escondido, CA. Ron Podsiadly,...
IF they are available again what is the price now???
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#282651 - 04/10/09 10:42 AM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
JohnRR Offline
I Win

Registered: 01/20/03
Posts: 71241
Loc: U.S.S.A.
Quote:

Eric sent me an email LAST NIGHT. He will have the castings in stock by next week. The rocker system is different, as I said, but he has those in stock now. I see no reason for a delay - at least not now. Here's his email to me:

Hello Rich:
The conversion head castings are supposed to arrive at our shop next week. We will run them through immediately. Rocker assemblies I already have.

Thanks
Eric




But wait , in the other POST you said they were already available ???


Edited by Johnahah (04/12/09 09:10 AM)

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#282652 - 04/10/09 08:23 PM Re: Stage V 440 to Hemi conversion heads [Re: JohnRR]
roadrunninMark Offline
pro stock

Registered: 11/25/03
Posts: 1534
Loc: GA
I would also like to know what the price of the kit is or who to email for more info.

Mark

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#282653 - 04/11/09 05:44 AM Re: Stage V 440 to Hemi conversion heads [Re: roadrunninMark]
Dragula Offline


Registered: 05/02/04
Posts: 8965
Loc: Taxes R-US, NY
For those unaware, these are not a super simple bolt on, they require some block work that has to be done right. The rotating assembly will be custom to, no kits currently available will fit them. The oiling system will almost have to be an external one, and you will need a bigger pan. The heads will hold a lot of oil up top, and it can drain a stock pan in a hurry.

Also, because your using a 440 block, its weaker because its not cross bolted. You might not think that's an issue until you bolt on heads that flow in the neighbor hood of 400cfm and the thing revs like a prostock engine. So now you have this big stroker kit in the block that revs like wicked in a less than appropriate block.....Thoughts to be considered when going down that path!
_________________________
2013 Champion Nostalgia Mod Gas Winner '71 Duster Pump Gas 512RB Indy EZ1 heads Fastest Pass 9.81/6.14 1.32 60ft 135.97mph '70 Cuda Pro street 484 Hemi, Originally 440-6 4-speed N96 Now going 605 all aluminum Hemi, stay tuned

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#282654 - 04/11/09 06:11 AM Re: Stage V 440 to Hemi conversion heads [Re: Dragula]
Silverbullet2 Offline
mopar

Registered: 09/28/05
Posts: 532
Loc: North Carolina, USA
I bet those heads on that block require special headers too. I don't see hemi ehaust manifolds fitting around a wedge block motor mounts, or 426 headers either for that matter.

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#282655 - 04/11/09 07:14 AM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
Dragula Offline


Registered: 05/02/04
Posts: 8965
Loc: Taxes R-US, NY
Quote:

Eric sent me an email LAST NIGHT. He will have the castings in stock by next week. The rocker system is different, as I said, but he has those in stock now. I see no reason for a delay - at least not now. Here's his email to me:

Hello Rich:
The conversion head castings are supposed to arrive at our shop next week. We will run them through immediately. Rocker assemblies I already have.

Thanks
Eric




Rich,

Did you get any prices?
_________________________
2013 Champion Nostalgia Mod Gas Winner '71 Duster Pump Gas 512RB Indy EZ1 heads Fastest Pass 9.81/6.14 1.32 60ft 135.97mph '70 Cuda Pro street 484 Hemi, Originally 440-6 4-speed N96 Now going 605 all aluminum Hemi, stay tuned

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#282656 - 04/11/09 10:15 AM Re: Stage V 440 to Hemi conversion heads [Re: Dragula]
Blakcharger440 Offline
top fuel

Registered: 01/20/03
Posts: 2388
Loc: Wichita,KS
Quote:

For those unaware, these are not a super simple bolt on, they require some block work that has to be done right. The rotating assembly will be custom to, no kits currently available will fit them. The oiling system will almost have to be an external one, and you will need a bigger pan. The heads will hold a lot of oil up top, and it can drain a stock pan in a hurry.

Also, because your using a 440 block, its weaker because its not cross bolted. You might not think that's an issue until you bolt on heads that flow in the neighbor hood of 400cfm and the thing revs like a prostock engine. So now you have this big stroker kit in the block that revs like wicked in a less than appropriate block.....Thoughts to be considered when going down that path!




Hmmmm...sounds like there are a few other things that i didnt think about when considering those heads.
Waaaay too much to change just to run those heads.
A person would be better off just buying a real Hemi block and regular Hemi heads since all those changes would need to be done.

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#282657 - 04/12/09 09:12 AM Re: Stage V 440 to Hemi conversion heads [Re: Blakcharger440]
JohnRR Offline
I Win

Registered: 01/20/03
Posts: 71241
Loc: U.S.S.A.
Quote:

Quote:

For those unaware, these are not a super simple bolt on, they require some block work that has to be done right. The rotating assembly will be custom to, no kits currently available will fit them. The oiling system will almost have to be an external one, and you will need a bigger pan. The heads will hold a lot of oil up top, and it can drain a stock pan in a hurry.

Also, because your using a 440 block, its weaker because its not cross bolted. You might not think that's an issue until you bolt on heads that flow in the neighbor hood of 400cfm and the thing revs like a prostock engine. So now you have this big stroker kit in the block that revs like wicked in a less than appropriate block.....Thoughts to be considered when going down that path!




Hmmmm...sounds like there are a few other things that i didnt think about when considering those heads.
Waaaay too much to change just to run those heads.
A person would be better off just buying a real Hemi block and regular Hemi heads since all those changes would need to be done.





WINNER ding ding ding ... WINNER ... ding ding ding ...

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#282658 - 04/12/09 11:31 AM Re: Stage V 440 to Hemi conversion heads [Re: roadrunninMark]
Mopar_Rich Offline
pro stock

Registered: 01/22/03
Posts: 1522
Loc: Sonora CA
Quote:

I would also like to know what the price of the kit is or who to email for more info.

Mark




I just got back from a race and Eric's email was there.
$2950 a set. But remember, you have to use the special Stage-V rocker system too. So that has to be added in.
(sorry no price on that yet)

As too the difficulty, there are a few issues but nothing outrageous. The problem was that there's no head gasket that will directly work. I took a stock Fel-Pro 1009 and cut and nicked it until everything cleared. You do have to grind the block for pushrod clearance, but it's not a big deal and I'm used to this with a Hemi. As to the mains, most of my customers that did this conversion were building street engines and were not going to race. Show - not go.

Randy brings up a good point with the oil drain back. That is an issue if the engine is kept higher in the RPM range. I think it was my second conversion customer that cruised his car with a 4.11 rear gear and he saw a drop in oil pressure at highway speeds because the pan was being pumped dry. He took care of it by changing the pan and running a thinner oil. If I ever do another one I'd drill out the drain back holes slightly, and paint the valley area with a gloss paint.

The exhaust on these heads are typical Hemi size, shape and bolt pattern. So normal Hemi header flanges are used if you fab a set of custom headers. Clearance around the wedge motor mounts and starter is always an issue, but both of the installations I saw used motor plates and they cut off the wedge flanges. It worked.

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#282659 - 04/12/09 11:35 AM Re: Stage V 440 to Hemi conversion heads [Re: JohnRR]
Mopar_Rich Offline
pro stock

Registered: 01/22/03
Posts: 1522
Loc: Sonora CA
Quote:


But wait , in the other POST you said they were already available ???




By "available" Eric means that he's still making them! They are never just sitting on the shelf.

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#282660 - 04/12/09 12:18 PM Re: Stage V 440 to Hemi conversion heads [Re: Mopar_Rich]
Rug_Trucker Offline
I Live Here

Registered: 01/19/03
Posts: 14486
Loc: Not2farfromNashville, TN
I remember an article back in the late 70's talking about building a 383 Hemi!


What intake could you use?

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