HVH Super sucker?

It’s hard to say one way or the other. I’ve seen an open spacer pick up 8 on a dual plane and kill 5 on a single plane. Then a 4 hole pick up 12 on a single and kill 3 on a dual plane. The best all around spacer I’ve seen that seems to work on just about everything is a Wilson tapered combo. I’ve seen it not make much, but I’ve never seen it loose. As for helping distribution, I’d say that is very combo dependent and you’ll have to do some testing. What I can tell you is a spacer will change the signal to your carb and your tune up will probably have to change with it.