Ok here it goes... About a month ago had a valve go out b/c of a loose rocker. Fixed it, tightened all the rockers to the propper lash, put it all together. Ran like a champ! Now here we go, started running crappy, hit & miss, innermitten misfire, here an there. Would over heat at idle, but would cool off once I would take off. Kept loosing coolant, and getting lots of steam from rad. Did some digging and found my answer. The head gasket is leaking into my cylinder, took all plugs out, two are wet. This confirms the bad HG. here is where the discussion starts, I'm going boosted soon, thought since I'm gonna have my head off fixing it might as well go big or go home so I'm gonna get a golden eagle headgasket and copper spray it, now there are a few different MM of them, they range from 81MM-87MM. Now what's a good one for boost? Nothing crazzy, 8-10 psi. (b18a1 is mine) and will a b18c one work on my a1?
Thanx in advance to all replies!!

 

81-87mm is not the thickness but rather the bore diameter... You obviously want what your bore is.