Head Gaskets???

Slantsix64 said

nope 0.45 is the max you can go without having to mill the intake any more than you would have too

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Yes, but if you mill the block and run a thinner head gasket, then you will have to hget the intake milled...

I ave a 318 that I'm putting together with closed chamber heads where I put the thinner fel pro .040" gaskets on and the intake would not fit - I galled the intake bolts trying to bolt it down... I had to get the intake milled for it to fit with the .040" gaskets...