195.6 two barrel upgrade

The plate itself doesn't do anything for flow because it's just the roof of the intake, the bulk is built into the block. It won't matter which intake plate you use. The Weber may bolt to the Carter WCD intake plate, but you'd still need a spacer. You can actually make a flat aluminum plate (should be at least 1/4" thick, 3/8" would be better) to fit on the top of the intake and drill it for whatever carb you want. I've done that -- still have one drilled for a pair of 1V Carter YFs. There will still be a problem with clearance between the carb and valve cover. At least with the 58-63 Americans there is plenty room vertically to raise the carb. On a 64-65 American there may not be.