Hello, anybody know if you HAVE to use a carb base gasket with the divider in the middle on this intake? I have run the open gasket before and it ran great, and this last time I made them up to match the opening on the intake exactly. The motor was just broken in and have not tuned it yet so before I get to far I wanted t know if i need to address this gasket deal or not. I know I have seen them before but it seems nobody sells them now except for a thick insulator one. Thanks for any insight.