im going all motor with my gsr Ive already got headers full 2.25in exhaust port and polished head HP Racing intake manifold and the cold air intake with a fuel regulator so i can adjust my fuel so I was thinking some JE pistons 12:5:1 would work nicely with some skunk2 stage 3 camshafts any opinions let me know

 

Sounds pretty good to me, do you have porting and polishing, because your gonna need some serious velocity to fully make use of high compression. I think Skunk Stage IIIs are a good choice, as long as they are big you should be alright, good luck on your setup. YOu might already have them but you should invest in some rods with compression like that, especially when you add cams.

 

skunk2 stage3's are ****** beastly

i like what you're proposing