3Darts
Active Member
My son has a 71 318 out of a challenger in his 68 dart. we have a set of 4071051 cylinder heads late model in the research i have found that casting number is 81 to 82 318 hp and fits 77 to 80 360 with a slight larger valve. my question is the chamber really bigger? be cause the bore is smaller? will it drop compression ratio below 8 to 1? with the valves .010 bigger there really should not be a block interference right?
Thank you
Thank you
