b18a all motor

[cprtyler]

here is my build then ill get to question.
p75 head port matched to s2 im and 3angle valve job
s2 im
hondata im gasket
crower valve train with 404's
buddy club cam gears
440cc injectors
68 mm tb
str fuel rail and fpr
balanced and polished crank
stock rods polished and shot peened
block guard
11lbs flywheel
stage 2 clutch
ctr crank pully
arp hardware
block bored 20 over
4-1 race header 2.5" stright through exhaust

the question is iv looked at 3 compression calaculators there all diff, looking for 12:1 cr. i have been told go with ptc pistons, i also been told p73 jdm pistons, give me imput because on the calc's there diff ranging from 11:1-13.5:1.any POSITIVE info would be great