I am just about to bolt the head on and I have been thinking about valve/piston clearance ?? The 307 flat top pistons are about .015 taller than 250 stock pistons and I have .040 milled off of the head and 194 intake valves. I am using the Mercrusier cam that I do not know what the lift is....The head gasket is .020 thick..Should I put some clay on top of the piston and turn it through and see for sure...or...maybe some one out there knows how much room I have to play with.SCRAP
