How good is the gas in Germany? 906 heads are fine, tons of race engines used these heads and did fine. Don't go over board on the cam, takes away drivability. Most here on Moparts will have you building a $50,000 race engine to putt around on the street. Keep it simple, you'll be fine with what you got. Good luck on your endeavor. Let us know how it works out. Mike
Yes 906 heads are fine, but not with a piston that is speced to be used with a 516 sized/shape combustion chamber.
Tons of race engines USED them because they were all they had to use, or the class specified them, otherwise they are a POOR choice, especially in a 383 that is hard to build compression in to begin with.
I just did the math, 90cc head, .041 gasket that is in the kit he bought, a piston .087 in the hole on a blueprint block (1.848 ch), his block may be a little taller, 7.52 compression ...
