Intake gaskets
The Ultra Seal Mr Gasket ones are the ones I like to use on small blocks..soft, and seal well. I use Ultra grey or black silicone for the ends. If the intake doesnt fit becuase the holes in the heads are further "up" then the intake, the intake has been milled, or a thicker head gasket was used for some reason. You can "double up" intake gaskets if you had to, but I'd be nervous doing that with any type of gasket. If the holes are "too low", then the intake can be milled to fit. You really need to be able to start the bolts by hand, otherwise there will be a port mismatch too..And Ive seen a few guys miss out on a lot because they decided to oval the holes int he intake, instead of getting it to fit properly.