Thanks Guys other than an install or alignment issue the only thing I can think of is that I did have the car up on its side on 2 wheels one day when I got way loose and took out the 1.8th mile timing blocks. I would think those bearings could take that abuse though. Apparently it has 4.56 Pro Gears in there part # 80-0570-1 rather the 4.77's. So now I'm thinking a 4.11 might be better as the engine builder thinks it will run low nines with the new engine. I plan to double enter and run as much as I can next year so I'd like to keep the RPM's down on the big end.