[PunchT37]

Originally Posted by 25stevem

RAII heads really good not make hardly any more power with factory cams up to the 068 then any other high comp D port head.
Even though they are round port exh style, they still have the stock D port type and size intake port.

I was thinking more on the lines of head casting worth, and compression. He`ll have to watch his tune. Like most of us.

[TxSportCoupe]

Forged always. Port everything. Should be a screamer. 428’s are my personal favorite. Most underrated and underestimated muscle car motor of all time IMO. Fastest street Pontiac I ever saw was a 428 running an HC-03 cam in front of a Doug Nash 5. It was Legend.


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[Formulas]

Originally Posted by TxSportCoupe

Forged always. Port everything. Should be a screamer. 428’s are my personal favorite. Most underrated and underestimated muscle car motor of all time IMO. Fastest street Pontiac I ever saw was a 428 running an HC-03 cam in front of a Doug Nash 5. It was Legend.


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HC03 is a good match for a 4" stroke motor i ran one in a 440 cuin with 11.25-1 compression lightly ported #48s my favorite build