Can anybody tell me what the overall difference would be between the D1ZE 64.6 - 67.6 cc 4V heads and the DOEA 61.3 - 64.3 cc 4V heads?? Both heads are closed chamber. I know the cc difference in minimal but curious how much more power the larger cc chamber heads would make?
Thanks.

 

The smaller chamber should make more power as it would raise the compression.

 

D1ZE-B (351 C Boss) is 66.1 cc and it's equipped with adjustable rocker arms and pushrod guide plates. HO uses open-type combustion chamber, other wise same as '71 Boss.

after D1ZE or DOAE your suppose to have another number. DOAE-H, R 70-71 by exemple have 62.8 cc with larger valve and porting than 2v head. 2.19/1.71 vs 2.04/1.66

D1ZE-GA 72-74 351C-4V have 75.4 cc open-type combustion chamber and induction-hardened exhaust valve seats.

351M/400 78.4 cc open type combustion chamber with small port.

 

cc them
specs are not accurate