hgerhardt, you eluded to a good point in your post...
"CR is 11.4:1 and works fine with 91 octane. (with this cam, might be too much with less cam)"
Your solid roller cam is rated at 0.0205" tappet lift whereas the Comp hydraulic roller cam is rated at 0.006" tappet lift. Therefore the 'advertised' duration for the two cams will not be apples-to-apples.
Here is a conversation that considers the situation:
https://www.forbbodiesonly.com/mopar...arison.205262/
The information provided in that specific thread does not represent any endorsement. It is offered for general interest only. I personally don't know enough about that specific topic, I suspect Jay S would. Maybe he will chime in.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
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5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
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