I went to the track yesterday to see if I could launch this thing any better than last week. I think I have it down so I don't really spin off the line. About 3psi seems to do the trick and 12psi in the slicks.
But something started to happen, I knew it was going to , it was just a matter of time.
After I launched, the trans will slip at the top of first and at the top of second, it still ran a 12.1 letting off twice, so I know it has enough power to go well into the 11's.

SO now the decision, do I go with a TH400/350 or do the 4L80E??

We all know how proven the TH is, hell it's been around forever, but I loose my overdrive. And cruisen on the highway now with these 3.07's and the 60, it's very nice. Plus I'm going to install about a 3000 converter, so the TH may be too much. BUT, I have considered the Gear Venders Overdrive unit, that would even things out a bit.
I know the 80E is just as stout, I'm just having a hard time deciding.

What you guys think?

thanks,