07-15-2021, 11:30 AM

67Fbird

Chief Ponti-yacker

Join Date: Mar 2021

Location: GA

Posts: 527

Quote:

Originally Posted by Dragncar

Find some 13s or 62s, 6X4s. 64 heads work great on 400s too.
13s and 62s are not 72 cc like the manuals say. More like 77. They will get you 9.4-9.6 CR if they have not been milled.

true story there...both sets i have are in the 76 cc area. Had my (now dead) set decked to bring into 74 after I did some chamber work 30 yrs ago.

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