Good call 3.73 is the most, I would wait till you got everyhing else done, and see what it does at the strip, and see how close it is, and figure out what would be the best gear, on spray 3.55 might be a better choice
3.73, with stock tires, mine willl go throught the traps in 4th, right on the limmiter, and mine has a raised limmiter. On 28s it has a littlle more, but 3.90 is as far as I would go with 28s mine is trapping 119 now
I did, dident help, tried it normal way by setting pinion parallel, and taking 2 degrees out, then tried making saft to pinion 1.5 degrees, still vibrates, but mine is only at high speed. So normal driving isent a issue.
Yeah, it tried to hook once, pulled both tires off, and then took out spinning, dropped the front then hooked again, felt like I was riding a bucking bronco...lol..
she was trapping almost 119 though, she will go if I can get a good 60