Thesse are really good foundations for horsepower as they have 4 Bolt blocks and factory Roller Cams-I am building one for my Car, but the jury does seem to be out in regards to the Heads-Dave, I'm sure is right, but I have heard they are limited in flow-I am using Edelbrock Heads, but there are many choices out there. The 502 Cam is a little limited, but certainly satisfactory for a street machine-Comp makes some good grinds for this engine-

Build it-it is in the same Gen VI engine Family as the current 502 and has great potential-