I need to know what head bolts i need to use. I have b16 bolts but i think i need the gsr bolts. please correct me if im wrong.

Other info on the build

GSR block
stock bore
pr3 pistons

Stock b16 head
supertech valve springs and retainers
gsr cams looking to upgrade to s2s1's

 

Yes, you need GSR head bolts/studs. You want to match the head bolts/studs to the block not the head.