Got the phenolic spacer. Will complete the install tomorrow. Hopefully it will cure the hard hot starts. I am thinking about going with the Holley truck avenger in the near future, for the off road capability. I read it does pretty good with angles, inclines, and nose dives. Right now I have a straight forward Edelbrock, not good for off road use. I saw some videos on the Holley site about tuning it. The avenger is supposed to be a straight out of the box and run, with minimal tuning. I was going with the smallest, 470cfm, for my stock 283 (except headers, performer intake, HEI (Malllory) distributor).