Two additional considerations regarding the use of the 325cfm heads.
The choice of intake manifold and with it the discussion involved with port matching it to the intake port size. Example, a Butler 325 cfm heads uses a 1.180 x 2.35 tall gasket
Camshaft lift vs. Cylinder head flow limits....
Note at what lift is that 325 cfm head rated at. I will assure you it is well over 0.600" valve lift. Probably closer to 0.650" or higher.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
Last edited by Steve C.; 03-08-2025 at 05:24 PM.
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