Just an FYI for those of you running Banks non-gated systems, and maybe the newer gated systems, the turbo kit I ran came without a grommet. The oil drain is the same size as a PCV valve. What I ended up using was a PCV grommet for my 460(86, carbed) which uses the same valve cover on both sides, and the grommet is made to fit the oil fill hole. I had to trim the outer edge of the lower part of the grommet about 1/16th, but, it worked perfectly.