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I am putting together a plan for a 90% street motor for my 69 RR, the for sure things are:

1. 69 440 Block, is .030 over already, needs to go .o4o over
2. Alum 6 Pack intake
3. Must look stock
4. Pump Gas

Going in a 69 Roadrunner, all stock weight, with an automatic and 4.10 Dana

My thoughts:

1. Block Bored .040 over, main studs
2. 440 source stroker kit, 4.25 stroke, 7.10 rod, 27cc dish for just under 10-1 static comp.
3. Stealth Heads, unsure about the cnc or not
4. Isky Iron Rockers, I have them already
5. Mopar .528 Solid Cam
6. Stock 402 pan w/tray

The goal is as much pump gas hp/tq, on a budget, looking stock under the hood.

My rational is:

By the time I have my stock steel crank checked, resize the original rods or buy replacements, buy pistons, rings, bearings..and have it balanced.....I will be well over $1000, and the whole crank, rods, pistons, etc. balanced from 440 source is $2000

By the time I have my heads checked, valve job, springs, etc., it would be close to $600 or more, the stealths are $1000 complete

The .528 Mopar cam has gotten good reviews with exhaust manifolds

I am undecided as far as manifolds versus headers.....I want the stock look, but I know I would be giving up a lot of hp/tq by going with manifolds.


My main questions are:

Will mainstuds be fine with the stock caps on a 10-1 or less street motor, or should I use billet caps ?

Should I get the cnc stealth heads ? They are $1000 more, but they have been checked out by Modern Cyl. Head so I would assume they would be near bolt on.

Will the .528 cam be optimal for good street manners, or maybe too small for a 512 ci ?

If I use headers, would there be a much better choice of cam ?

Would 1 7/8 headers be fine, or 2" ?

Any advice, critisisms are welcome//// Thanks

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I would also sacrifice the stock look for a 2 or 3 quart bigger oil pan.

Sheldon

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put on the 6qt hemi pan and go with a larger cam .

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I am putting together a plan for a 90% street motor for my 69 RR, the for sure things are:

1. 69 440 Block, is .030 over already, needs to go .o4o over
2. Alum 6 Pack intake
3. Must look stock
4. Pump Gas

Going in a 69 Roadrunner, all stock weight, with an automatic and 4.10 Dana

My thoughts:

1. Block Bored .040 over, main studs
2. 440 source stroker kit, 4.25 stroke, 7.10 rod, 27cc dish for just under 10-1 static comp.
3. Stealth Heads, unsure about the cnc or not
4. Isky Iron Rockers, I have them already
5. Mopar .528 Solid Cam
6. Stock 402 pan w/tray

The goal is as much pump gas hp/tq, on a budget, looking stock under the hood.

My rational is:

By the time I have my stock steel crank checked, resize the original rods or buy replacements, buy pistons, rings, bearings..and have it balanced.....I will be well over $1000, and the whole crank, rods, pistons, etc. balanced from 440 source is $2000

By the time I have my heads checked, valve job, springs, etc., it would be close to $600 or more, the stealths are $1000 complete

The .528 Mopar cam has gotten good reviews with exhaust manifolds

I am undecided as far as manifolds versus headers.....I want the stock look, but I know I would be giving up a lot of hp/tq by going with manifolds.


My main questions are:

Will mainstuds be fine with the stock caps on a 10-1 or less street motor, or should I use billet caps ?

Should I get the cnc stealth heads ? They are $1000 more, but they have been checked out by Modern Cyl. Head so I would assume they would be near bolt on.

Will the .528 cam be optimal for good street manners, or maybe too small for a 512 ci ?

If I use headers, would there be a much better choice of cam ?

Would 1 7/8 headers be fine, or 2" ?

Any advice, critisisms are welcome//// Thanks

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Couple of things....

Spend a few dollars and have that block sonic checked. If its good, then go .055 over. The piston/ring choices are more favorable.

Forget about the 402 pan and go with the 70-71 street hemi pan. Leave the oil pickup 3/8"

-Def let an experienced head guy MCH or Porter set up the geads for you.

-That cam is NOT a good choice for that motor or for manifolds. You need to decide that at this point before doing anything else manifolds/headers.

-Def do the stroker.. You are correct about the economics of it. But dont think that cheap stuff will work out of the box. many of those cranks need to be ground even though they are new. Figure it in to the cost.

MB

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Here is advice you don't want to here. Put the motor back to stock as much as you can. A 4.25 crank and rods is dumb for any 90% street driven motor. The cam you can put in a nice comp high energy cam around .510 to .530 and have a nice torque motor that will burn the tires up on the street. Or you can do what these guys want and have a gas drinking ill idleing /smelly street car that will need to be worked on every day.

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Couple of things....

Spend a few dollars and have that block sonic checked. If its good, then go .055 over. The piston/ring choices are more favorable.

Forget about the 402 pan and go with the 70-71 street hemi pan. Leave the oil pickup 3/8"

-Def let an experienced head guy MCH or Porter set up the geads for you.

-That cam is NOT a good choice for that motor or for manifolds. You need to decide that at this point before doing anything else manifolds/headers.

-Def do the stroker.. You are correct about the economics of it. But dont think that cheap stuff will work out of the box. many of those cranks need to be ground even though they are new. Figure it in to the cost.

MB

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I was looking at the Muscle Motors web site, they offer the same stroker "kit", balanced, for the same price as 440 source, and he makes a convincing case, stating that everything is checked to be almost a drop-in deal.....anyone have any experience with them ?

The 528 mopar cam was thought of because andyf on here had good results with exhaust manifolds.

The 402 pan, Iron Rockers, and 1 7/8 headers were for budget reasons as I already have them.....if this will be mostly street driven, probably never see over 6000 rpm....with a six pack set-up.....relatively low (<10-1) comp. so there should be no fear of detonation.......are the stock main caps ok ?

How about the heads ? Should I spend the extra $1000 for the cnc versions ?

Thanks

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Here is advice you don't want to here. Put the motor back to stock as much as you can. A 4.25 crank and rods is dumb for any 90% street driven motor. The cam you can put in a nice comp high energy cam around .510 to .530 and have a nice torque motor that will burn the tires up on the street. Or you can do what these guys want and have a gas drinking ill idleing /smelly street car that will need to be worked on every day.

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This does seem a bit odd to me also...............Been beating on small and big blocks for years ALL of which see lots of street and a few passes here and there and my latest 470 is no different and VERY streetable AND depedable w/only valve adjustements every few months. I actually said to pick a medium cam by my standards but the sky`s the limit and your desires and budget also play a big role. Lots of different ways to go and me, well I go as close to all out as I can for the combo and my n/a street car is crazy fun on the street and surprises many at the track. You`ll figure it out................

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Here is advice you don't want to here. Put the motor back to stock as much as you can. A 4.25 crank and rods is dumb for any 90% street driven motor. The cam you can put in a nice comp high energy cam around .510 to .530 and have a nice torque motor that will burn the tires up on the street. Or you can do what these guys want and have a gas drinking ill idleing /smelly street car that will need to be worked on every day.

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This does seem a bit odd to me also...............Been beating on small and big blocks for years ALL of which see lots of street and a few passes here and there and my latest 470 is no different and VERY streetable AND depedable w/only valve adjustements every few months. I actually said to pick a medium cam by my standards but the sky`s the limit and your desires and budget also play a big role. Lots of different ways to go and me, well I go as close to all out as I can for the combo and my n/a street car is crazy fun on the street and surprises many at the track. You`ll figure it out................

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