Compression

[MrWesson22]

As already said, static and cranking compression are independent. A cam with a later intake valve closing will bleed off more compression and have a lower cranking compression even with the same static CR. That said, all you really need to worry about is cranking in determining what octane fuel you need. Witht 195, you can still use 92 octane as long as you watch your timing and listen for detonation. A 351C's stock compression varied as much as 2 or more full points depending on the year and heads. Without knowing the CC of the pistons and heads, there's no way of calculating static CR.