replacing my 4 barrel holley with edelbrock 1410 on my 454 chevy bigblock.having issues on info I got on mounting to original adaptor.wondering if I should mount directly onto my squarebore manifold.my primary ports on holley adaptor slightly ovel shape and gaskets provided don't line up proper on those two.the adaptor that was recommended have slightly smaller bore on bottom side of primary ports and I think I will lose too much flow.