318 Build - Expert Review Needed

OP. looks like you have done your homework. Do you have the piston part number to share? If just guessing a standard stock replacement piston type, I get right at 9:1 static CR and 7.5 dynamic CR. So it ought to work decently well down in the low RPM's, with better DCR than stock, which you will appreciate IMHO with the manual trannie. Ought to run on regular pump gas with reasonably tuning care.

I personally would not touch the intake; IMHO it will quite handily outflow the heads and valves.