Replaced head gaskets,manifold gasket,intake gaskets. Ect. On my 350 TBI in a 90 Chevy k1500 and I'm stuck been a tech for 6 years and never had this happen. I have a severe missfire I've checked base timing and wireing it is a dead miss I've checked valve adjustment and also its fouling 7 and 8 plug also has alot of pressure build up in cooling system and has sucked upper radiator hose flat twice .... could this be a faulty intake gasket? Please help I'm stuck ohhhh almost forgot truck had cracked head replaced bank 2 head