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Engine building help needed.
Anybody willing to share a secret to getting intake manifold gaskets to seal? I have a recurring problem on my old Mustang. I am pretty sure the gasket is failing on one of the back two ports on the left side. I keep oil fouling the back two plugs, sucking oil from the case I am pretty sure. The last time it happened, when I pulled the carb there was an oil trail in both of the problem cylinder intake runners. I tried silicone around the ports on a FelPro gasket but it failed again I think. The motor is a 408W with RHS 225 cfm heads and there is not much meat on the head gasket mating surface around the ports. The engine is all new except for the block.