Crazy Backfiring

[roysgreenstang]

No offense taken. I myself as a trade choice am a mechanic. The mechanics that did the adjustmant other then myself are all licensed mechanics. I also had them look at the timing gears to ensure i wasnt incorrest installing them. The gears have been checked at least 10 times last year, and they are correct. But like is said, when i get home im ripping it all apart again, and starting over on an engine stand so i can take my time and ensure everything is properly put together. I will be trying everything you have told me. Yes i am running mufflers. They are flowmaster, and im sure that they arent giving me any amount of back pressure. The car has long tube headers too and a 2-1/2" H-pipe. the header do cover the exhaust ports on the heads, but its a close fit. And thats all i have for information about the car to offer. I cant wait to get home and try everything. Ill get her going 1 way or another.