Hello IHI, Im new to the forum and saw your '86 firebird. Are you still running that car? It looks like a good running car. I have an '89 that I just started working on. I bought it from a kid that needed lawyer money. He built a balanced 333, I haven't been into it so don't know what is in it. I put some aluminum heads on it and woke it up pretty good. Has a 540ish lift hyd, long duration cam. Has a 3500 stall in a th350. Its a ws6 formula so it had the borg warner 9 bolt rear. It was wore out so I put a strange 9" with spool and 4.11's. My best is 11.78 @ 113 on 150 shot and want to get down in the 10 range. Ive been told it don't take much to get these cars in the 10's. Got any suggestions? Thanks! D