Hey guys. New to the forum. Appreciate any help. I got a 88 camaro iroc z that's been converted to carburated 350 about a month ago. I put a new edelbrock 1406 on it right after I bought it and it was running fine. Then I put it in the garage and put 4.10 gears and posi in it and ever since then it's been running terrible. Pretty sure it's just coincidence with the rear end. It idles ok but doesnt want to acceletate at all. I put a fuel pressure gauge by the carburater that bounces around like crazy thinking it was a fuel issue but then tried to time it with a light and the with the advance plugged off and the only way I can see the mark on the crankshaft is with 85 degrees advance of the timing light. I'm confused and don't know where to go from there. Thanks for any help or advice.