If you are speaking of this cam it uses Comp XE lobes, numbers 3315 & 3316:
https://butlerperformance.com/i-2503...tegory:1272239
His similar grind with 242 degrees exhaust duration uses XE lobe 3317
https://butlerperformance.com/i-2503...tegory:1272239
The original Old Faithfull cam uses Comp High Lift Magnum lobes 3122B and 3120B, note the "B" suffix code can but not always alter the seat duration and or lobe lift than what's stated in the catalog.
The newer version of the Old Faithful cam is slightly different, I believe it uses a combination of XE and Magnum High Lift lobes. I suspect they are lobes 3196B and 3123B
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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/
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5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
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