I got a extra set of heads to work on, then swap onto my car so I don't have much downtime. The heads have the casting # 1238145, which are 70-71 casting. My car is a 72. Anyone know the CC's of each head. Was the difference in compression ratios changed by the head, or was it the pistons?thanks -Nick
No difference in those heads . They will all be the same, other than the 72's will have smog passages in them. Jim Burek
from http://www.nhra.com/tech_specs/engine/blueprints/BUI-72.rtf heads are 50cc, shows it being part of the 155 hp motor my understanding is that the higher compression motors did not have the recessed area on the pistons there was a 195 hp 350 motor in that year so those heads would be part of the low compression setup based on the way the info reads -- there has been some question as to how accurate the info is -- so read into it what you will
