Trouble with stage VI heads

[salty_eye9692]

I'm building my first big block and first mopar, a 1972 dodge charger se. I have these ported stage VI heads. I thought I saw that you could use factory rockers on the heads but I am not sure I'm comfortable with how close they are getting to the valve cover gasket surface. I'm running a hughes whiplash cam and hughes flat tappet hp lifters. Are there decent priced rockers and pushrods to get? Are my push rods too short? I'm running factory 383 pushrods but I do have factory 440 push rods as well.

 

[Fran Blacker]

Think you need a side shot. Need to see rocker and valve stem contact.

 

[RemCharger]

I've never seen someone try and put stock rockers on a stage 6 before. Agree, that's no good.

 

[Virg464]

That certainly looks tight. I'm not an engine builder but I don't think you can switch between "B" and "RB" block push rods. I'm sure one of the engine guru's will chime in and help you out.

 

[pnora]

I ran the Crane Golds and the ISKY ductile iron rockers. No matter which rockers you use, you will need to measure for push rods.

 

[Don Frelier]

Is it a 383 or a 440?
You can't mismatch the pushrods

 

[33 IMP]

Contact B3 Racing engines for a recommendation. And look at his Mopar rocker arm geometry series at his website. (Four vids). The owner is a Mopar rocker arm geometry specialist, and a good guy.
And RB pushrods will be way too long for a low deck motor.

 

[Geoff 2]

Odd. Looks like the rail on an alum valve cover could hit the rocker.

 

[lewtot184]

Crane made an offset intake rocker for those heads and it may or may not be necessary for what you're doing. Do diligence is a must when setting up the valve train. I think the bigger issue is the push rod tunnel in the head. The more lift the cam has the more interference. Last time I messed with them I did have to work the tunnel some.

 

[dvw]

Obviously you are using a small cam. If the rockers don't hit the head I wouldn't be concerned. If the preload on the lifter is close. Then the pushrod length you are using for this application will be as good as it gets with non adjutable rockers.
Doug

 

[rickseeman]

Stage VI's are sexy. I think Stage VI's are kinda advanced for a first BB Mopar build. I don't think you just throw them on. You are going to need to do a lot of looking, siphering and asking questions to get them right. Start reading and talking to people and don't get in a hurry.

 

[PRHeads]

If you look at the proximity of the rocker saddle to the valve cover rail, you can see the VC rail is much higher relative to the saddle than on a factory head.
As such, the VC rail is just closer to the rockers.

If the valve lengths are longer than stock, it would exacerbate that situation.

On a stock head, the lowest part of the saddle is about .600” away from the VC rail(at the ends of the head).
On a stage 6, I’ve seen the lowest part of the saddle almost even with the VC rail.

On uncut heads, the dimension from the bottom of the saddle, to the bottom of the head, for stock and stage 6, should basically be the same.
The VC rail is just that much higher.

 

[33 IMP]

A fabricated aluminum cover with tubes for the bolts MIGHT clear those rockers. A stock steel cover might clear, too.
I'm betting a cast aluminum cover won't.

 

[jdsgtx]

I'm building my first big block and first mopar, a 1972 dodge charger se. I have these ported stage VI heads. I thought I saw that you could use factory rockers on the heads but I am not sure I'm comfortable with how close they are getting to the valve cover gasket surface. I'm running a hughes whiplash cam and hughes flat tappet hp lifters. Are there decent priced rockers and pushrods to get? Are my push rods too short? I'm running factory 383 pushrods but I do have factory 440 push rods as well.

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Should’ve gone with solids