hello all, finally got my motor together and need to use a carb spacer. I have a 355, 9:1cr, 268HE cam, 492 heads, performer intake. Holley 670 vac sec carb. I need a spacer and I have a open one (1"). Is this ok, or should i get a 4 hole one. I can go to a 1/2" also, just need to clear the linkage.