Manifold leakage and warpage is one of the many problems on Chevy sixes. It comes with having the intake and exhaust on the same side of the block, leaving nowhere to put enought bolts in to hold the manifold to the head. If you're having problems with leaking, smear a bead of ultracopper rtv on the gasket before assembling, and leaving it sit for 24 hours to cure before starting.


Fred
52 3600
69 C-10