Checked depression chamber, seems to be working fine. Checked compression,
cyl 1 115 psi
cyl 2 125 psi
cyl 3 130 psi
cyl 4 130 psi
I would think a cracked head or blown head gasket would make a bigger difference than 15 psi.
Checked bowl vent valve- seems to make no difference. I might pick up some NGK's tomorrow to see if that helps, but I'm leaning toward the 20 year old carb myself. I've priced them out and I think that I will be doing the GMod before I spend that kind of dough on a carb. Even if I stick a cam, a carb and a header on my 2.6 it will still be a slug turning 33's, and starions don't seem to exist in canada so a turbo swap doesn't look so good either.