Cometic 2mm I had my head machined and use Arp bolts and I'm pushing 16psi

 

I'm running oem gasket and running 14psi. Checked compression last night. 3 out of 4 cylinders were 180-185, the last one (closest to the firewall) showed appr. 172. Just order FB head studs and new OEM headgasket right away?.. I didn't have the problems with oem rad before pushing the car a bit harder some times.. Then the temp gauge started messing, which came from air obviously. It seems like it works fine if I bleed the system and drive carefully, but if I do a couple of hard pulls, the temp rises quickly and air comes out again. That also leads me to believe headgasket, and that the air probably comes from the cylinders from the high pressure.