What did the cam manufacture recommend ? And keep in mind heavier valves require more seat pressure, as an example a 2.110" vs 2.190" size. How aggressive are the lobes. Type of retainer material factors into its weight. Rocker arm ratio. Lot's of factors.
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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.; 10-08-2017 at 11:33 PM.
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