Head Choices - With Domed Pistons

billsdartgt said
I don’t have the number with me but they are the 11.5.1 piston. 4007042? maybe, a pict is in my valve seal thread

I guess to clarify a little more, the 915 J heads I have would seemingly work well with some port work and the actual flow numbers look good and depending on how many more setbacks I encounter this may be a path I choose. While I have gone a lot further with this engine than planned I realistically will have to draw the line at doing anything with the block or pistons, Thanks to the info here on Fabio I at least have a better setup that should work ok than where I was at and where I was going. Assessing what more I could possibly financially do the heads are a possibility, much more and the car will get pushed to the corner and covered, it’s turned into a pain in my *** right now. Most all of the heads I see have the smaller combustion chambers, which is detrimental to my engine/piston setup, so perhaps just the work on my current heads, if there is even some place still open might just be best. Thanks for the reply’s.

Work on your heads. They ain’t the power killers everyone likes to claim.

The biggest issue is they 50 years old, core shift will bite you in the arse (BTDT many, too many times) and the exhaust port is wonky.

Other than that, which all can be worked around there is little wrong with them. I can pick apart the Edelbrock heads or any other equally. The exception is the Trick Flow head. For a head with OE architecture it’s the best I’ve seen but the chambers won’t work with your Pistons.

A quality valve job (with a 45* seat I used 4 angles on the intake and a radius on the exhaust) and the widest top cut you can get, blend the bowls, radius the short turns and if you are feeling froggy, reduce the size of the guide in the intake port and you’ll be happy.

My junk has to come out so before it goes back in it’s going on the dyno and we'll see what kind of a roach it is. I’ll post the results and some video here. Hopefully that will happen in June but with the country losing its mind it could be August or early 2021.