Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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My head's casting number is 3947041, here is the info i got on the head 3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
my question is what is the size of the intake runners?...would it be the same as the 3947041X head (165cc intake runner)?...also i have google the casting number several times and i keep getting 64cc and 76cc combustion chamber sizes and im not sure which is right.
They're pretty much identical to the 186 castings. Couple different intake valve sizes, either 1.94 or 2.02. 64cc chambers and 160cc intake ports. The "x" versions are same except +5cc's on the ports, if memory serves me correct.
I plan on porting and polishing them hopefully get some more flow out of them...im building a 383 so do u think these heads will flow enough after the port and polish?
