65 389 70 #13 HEADS

will 400 heads work 389 stock bore will i loose H.P.? iam kinda new to the 389 thanks for any help

That depends on C.C. size of the head. send me the casting number from the center exhaust ports ie: 6X,7H3 etc.. and I will tell you cahmber size.
Mike

Sorry didn't see top of post DUH!!!
This combo should be great !!!



cast year CID HP in ex cc

13 1970 400 330,350 2.11/1.77 72 AT Ram Air III