Mathew, ALL the math is " Static CR" Dynamic can be 1 whole point lower... 9:1 running, is actually 8:1 .
If you run a 71 and up style PS pump, alt set up, there is not a provision for it on 1970 and older heads.
You would need to make a bracket with threads in it.
Don't mill too much or you engine becomes a 1-off
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather
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