Small Hughes cam in 318

YoloCtyFlash said

I forgot to mention that Hughes recommended not going over 9.25-1 CR. Using that and the ICA of 61.5* in the Wallace calc. gives me a DCR of 7.5 - and a Cranking Pressure of 145. I can get there with milling the 360 heads, block is already milled .030". Still no good? Judging by their 9.25 CR rec., I thought it was a small cam. lol Thanks.

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If you go with 3.91s, she'll have no problem at 9.25 burning any old gas. 7.5 is not in the basement yet. But again, band-aiding the cam with head-milling, costs about what a proper cam costs, and no milling;cuz cutting the heads is gonna require cutting the intake, and maybe the valley ledge too.
If you put those big-port heads on there with that cam, you are gonna need some higher compression, not for the pressure sake alone but also to get the air flowing early enough to not have the bottom end go limp on you.
So now, just what is your deck height, and are the pistons flat-tops?