Is anyone running a carb. spacer on a edelbrock rpm air gap? If so how tall, four hole or open? I've seen alot of different posts about this & wanted to get some input from you guy's. My car is a 79 Z-28 with a 383, Dart pro 1 Platinum 200cc heads, Comp roller cam. I think without looking 510 IN. 540 EX. lift. 410 gears. b&m holeshot 10" 3000 converter. Quick Fuel 750 super street carb. with annular boosters.Compression is 9.9-1 The reason for wanting to do this is Basically for another vacuum fitting for pcv to go to. No room for fitting under carb. without spacer. I did tee off the port on the back of the carb. and ran the power brake hose and the pcv. together. I was putting in an msd box and when I took off the dist. cap found alot of oil in the HEI. I'm thinking that I'm building crankcase pressure by not having a good enough vacuum source for pcv. by combining it with the brakes. Any thoughs or opinion's would be appreciated. Thanks.