No matter what you decide to do, unless already done so I would suggest you check your current valve spring pressures. Tested with their retainers in place at their verified installed height.
Valve springs can lose pressure over time.
If the decision is made to upgrade to a hydraulic roller cam new valve springs will be in order, and with a presumed increase in their pressure used.
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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)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
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