Post up a few pics of those heads

Casting #


Chamber


1.88" intake valve


Exhaust ports, no smog hole


Intake ports


Rocker shaft stands


Hydraulic roller cam pushrod holes


These valve tips are wasted. The wear mark is way off towards the exhaust side and there is a sharp edge on the tip face.

Having problem downloading pic. Have these specs-Valve length 5.0",top of pedestal pad to deck is 4.060", intake pushrod holes are stock LA casting # 4772576.

Those heads have the cradle for the shafts..
from what I see they are just a stock style
head.. I think with a swirl chamber... if
they have 3/8 hold down bolts some one tapped
them for the bolts

I built a few sb oval track motors for the local dodge dealer around 92-94.
For one of the builds we used the MP high performance/high swirl bare heads, and at that time what we got was just a pair of 308 castings. They were cheaper to buy through MP than through the parts dept as a replacement part at the time.

Anyway, I do all the same prep we did to all the other heads we were using, which were just various used OE 360 castings, and we discovered after these were done and installed on the block that that rocker stands were machined too close to the valves.
We were using Norris stainless rockers, and with these heads the rocker body wouldn't fit between the shaft and retainer.
Pulled a couple springs/retainers, and the rollers were basically hanging off the edge of the valves.
We had the stands cut off, and some new stands fabbed up that relocated the shafts back to the correct position.

I find it hard to believe the set we had were the only ones made like that(especially knowing how much variation I've seen in how stage 6's are machined).

Sounds to me like if you're intent on using those heads, they're likely going to need to make a trip somewhere to have some stands made to get the rocker geometry sorted out.
I wouldn't count on being able to just buy some off the shelf parts to get it done.

If the images are to large to upload e mail them to your self, it should give you the option for small, medium, large or original size IIRC. I always choose medium and they load fine.

Would the fact that these heads were used on hydraulic roller motors have something to do with that? Could the roller lifters change the geometry enough to cause the alignment issues here?

Or was it just poor QC?

That set of 308's were just made wrong.
No rockers had the correct contact pattern..... Not even stock ones.

I'm sure the poster above with the 576's that have the tops of valves all messed up has a set of heads with a similar problem, but maybe just to a lesser degree.

If the OP sent his heads to B3, I'm sure he'd be able to make some stands and supply a set of rockers that would work.

They could do it at T&D as well, although the price for them to do it may not be all that friendly.

These are the pics that I have of the heads in question.

4.050" is the spec given in the old MP engine book to make it so you can use w2 rocker stands on std heads.
Looks like that's what was done to those heads.

It appears they milled the valve cover rail as well.

"In theory", you would need the w2 rocker stands(P5249049)and offset shafts(P4120589) to fit those heads, if they have the std length w2 valves.

With the big pushrod holes and small pinch (port), to me they look like class racer type head where they want a good valve train.

I may of missed it in the reading, but are they open or closed chambers.

So what were the pics of the other head that
has the cradle for the shafts... as said by
Fast.. these may have been cut for the W-2
shafts and stands (the short ones) and off set
shafts

Those were mine, Mr. P, not the O/P. I posted them up just for comparison since he was unsure of what he has. Clearly someone put some work into his heads for whatever reason, hence the confusion.

Originally, these 576's were OTC replacements for stock-type heads. They were available around 20 years ago and only for a short time before the Magnum stuff took over. It does seem a little peculiar that someone would go through the trouble they did with these things, especially if they were for some type of limited class racing.

Mine are essentially the original configuration of what he has. The caveat here is that Mopar DID offer ported versions of these heads with 2.02" intake valves (as opposed to 1.88" like mine). However nothing in their nomenclature or descriptions says anything about milled rocker shaft stands.

Hopefully that all makes sense...

Those were not my pics. That's why I stated "these are pics of the heads in question". The RED HEADS are not mine.

In that pic with the caliper measuring the height, it looks to be 4.105", not 4.060".

I checked a stock 596 head I have here, and it's 4.110".

If yours is really 4.105", then they're likely going to need to be milled down more to facilitate the use of bolt on stands.

Ultimately, it's likely going to be cheaper to just have someone fab up some on-center stands so you can use std rocker shafts and rockers.

The w2 offset shafts are $150 each, and the stands are another $150.

By having the pedestals modified in this manner, it looks like the cost of the rocker gear will be higher than it really needs to be.

Yeah I got lost with those other pics.. because
you said yours had milled flat stands and the other
pics clearly had the cradles... thanks guys for clearing
that up for me.. myself I would get the short stands
and start working from there... test for the geometry
then if needed mill the stands a small amount and check
them again

I would no way dump all that money in a set of heads that at best go what, like 190cfm. My

Save them for a conversation piece. Other then that, don't bother with them.

With a good valve job and "decent" bowl work they should flow 230-240....... And he already owns them.

With some proper on-center bolt on stands they would be able to use normal rocker gear.

Still worth using IMO.

To get an idea of just where I was with those things, I'd mock them up with some shafts sitting on top of the Indy rocker shaft clamps, and see where something like a Comp Pro- Magnum rocker sits on the valve.

ok put a 1000$ in them .....just saying