what size intake ports do these heads have ? max wedge size ? TIA as always.

Std size.

The old stage V heads were basically a cast iron 452 head with some minor modifications. It has been a long time since I looked at a set of those. I think Mopar added a little wall thickness in some areas but that was about it.

andy, these are aluminum heads. part # is : 4532134 [but the 3's may be 8's ?]

I don't recall a Mopar aluminum Stage V head. Stage VI was an aluminum head.

Stage V = Iron
Stage VI = Aluminum

I have a set of “standard”(original style, raised std port) stage 6’s here that have that casting number.

The “part number” for them is P4529335.

Not including the Chapman stage 6’s, there are 4 different versions of the stage 6.

-Original stage 6(raised std port, straight plugs)
-MW stage 6 with angled plugs(raised MW port, small kidney shaped chamber, needs .485 offset intake rocker)
-MW stage 6 with straight plugs(MW raised port, std heart shaped chamber, straight plugs, .485 offset intake rocker)
-street stage 6(later called the aluminum commando head, non-raised std intake ports, straight plug)

here are a couple of pics. maybe i don't know what i'm talking about. [wouldn't be the first time ! ] i shoulda done this in the first place.

fast, how can i tell what these are ? they have 2.250 intake & 1.8[?] exhaust valves.

They certainly look like the basic Stage VI w/ the RB intake spacers. The Crane rockers are standard-offset, and it's a standard M1 intake in the pics, so that should rule out being a MW version.

Stage VI seat inserts are borderline wide enough for even a 2.19" valve; can't see a 2.25" fitting w/o replacing the inserts. Even then, those ports aren't likely going to benefit from a valve that size as small as they are.

I've done several sets of the Stage VI MW angle plug heads. They are a giant PITA to make work, but they can make power.

They suck to port for sure.

As Brad said, std port intake on spacers on an RB block, std offset rockers and straight plugs = original stage 6.

And ditto on the seats.

The heads only come with intake seats that are 2.187”........ and don’t go very deep.
If they haven’t been replaced already, they need to be.

Why Chrysler used seas like that I have no idea. They did it on the W-5 heads too. The first step on heads like that is a seat replacement with a quality ductile iron seat.

Related reading:

https://board.moparts.org/ubbthreads/ubbt...tml#Post2423900

VI, or 6.

The visible number is the raw casting number, Last sold as machined/packaged P4529335.

Originally std. port window. Could be almost anything now, though.

https://board.moparts.org/ubbthreads/ubbthreads.php/ubb/showflat/Number/5240324/site_id/1#import

https://board.moparts.org/ubbthreads/ubbt...html#Post323080

LOl I remember that thread

thanks guys ! i am looking at this engine for use in my charger. it's a 500", and seems to have reasonable parts. was thinking to replace the intake with an original, 62 MW intake and carbs. then, just a general refresh on the block. has an A&A trans with a RMVB, an aluminum drum setup, and 5 pinion planetaries included. available 3500 converter plus other parts.
wife and i need a good day trip, and this is only 100mi away. owner has no problem tearing apart for a look see.

You’d still need to use the spacer plates with the x-ram intake, and without the heads and spacer opened up to MW size, there will be a pretty sizable port mismatch.

I had a customer who wanted to do the same thing intake wise, really just for the looks........ I just opened up a set Stealths.
The report I got was it worked fine.

Stage VI heads have a variety of well known problems but some of them worked just fine. If it was me I'd look for evidence of any water leaks. See what the plugs and ports look like. Even if it ran great for the current owner the heads might develop a problem for you. Could still be a good deal if the price is right.

i can't quite make out the number on those rockers. are they needle bearings or bushed ?

All the crane golds for mopars are aluminum rockers running on steel shafts.

Usually fine (for a while) with spring pressures under 600lbs.

Neither; the aluminum body runs directly against the shaft.

i'm not a fan of that. what bushed rockers would you recommend ?

here is what i am contemplating :

440 block bore 4.360
rods 6.768 long h beam
crank mains & rod are std. 4.15strk both rods & crank are eagle
pistons ross 12.5:1 comp
mains & head are studs
mylodon single stage hv (have 2 stage set up )
heads mopar stage v 2.250 in. 1.8ex,single stage intake ,no carb,no dist,
no water pump(have used meziere electric,if interested this is option??
roller cam crane 1.5 rockers cam I believe to be comp cam

this, plus a rollerized A&A 727 with RMVB and aluminum drum for around 6500. other parts are available, but i don't know exactly what. my thoughts were to use my MW intake, and install with 2" TTI's in my charger after an inspection and refresh.
thoughts ?

if the rod journals are stock Mopar 2.375 size I would sell the rods and pistons and have the crankshaft offset ground to BB Chevy 2.200 size and offset to 4.300 stroke and buy some BB Chevy 7.100 long rods with the .990 pin size and buy a really good set of a lot lighter piston and pins
What size rings are on the pistons you have now?
If your going to race this motor only look at a skinny ring like 1MM,1Mm,1.5MM in all three grooves, not 1/16,1/16, 3/16

can't answer the ring package at this time cab. got to go look at this setup first. the pics were sent to me by the owner, who is roughly 125mi away from me.
looking to put my charger in the 11's if possible, without spending 15k. as it is, i will have to upgrade the rear [it's an 8 3/4, 742, 3.91 now] and driveshaft, plus frame connectors. the docs and hospital need "assistance" ya know !
if all checks out as described, is this a reasonable deal ?

As has been mentioned....... with the heads having 2.25 intake valves, and not knowing if oversized seats have been installed to facilitate that...... they could be a big fan of worms.

Buying used race stuff is risky at best...... throw unknown stage 6 heads into the mix...... and the risk factor def goes up.

Perhaps there is documentation of exactly what’s been done to the heads buy the shop that did them.
They might be really nice set of heads........ but they also might have intake seats about ready to fall out.

11’s out of a Charger?
That’s just a flat top 440 with a decent cam, e street heads, an rpm intake, headers, 9.5 converter and 3.91/4.10 gears.

I wouldn't pay $6500 for that engine and trans even though I'm sure the guy spent a lot more than that to build it. The problem is that some of the information is incorrect so that makes you wonder what is what. Plus the engine in the picture doesn't appear to be well cared for. It has rust on it and it appears to have been sitting for a while. As pointed out before, Stage VI heads have a bad reputation. Maybe those heads are good ones, maybe they aren't. I suppose you have to go look at it in person and talk to the owner to know for sure. Good luck.

thanks guys ! i have all winter to get something done, so there is no rush. your advice is greatly appreciated !

Where are you going to find a 6.768" H-beam rod? AFAIK they do not exist. Most aftermarket rods are 6.760. I think there is one 6.765 out there but it is in an expensive line.

R.