There is a bunch of great info in this post. I will share my combo even though I am trying to get it dialed in still. Mainly a street car but it sees the track a lot too.

70 cuda with a 493 not sure of the weight
23 spline transmission
80w90 gear oil
best pass launched at 3700 spinning the tires
m/t 275/60 drag radials
shifting at 6200 (not powershifting)
mcleod single disk 11.95
3.23 gears stock suspension ran 12.55 @ 111

Now have some homemade caltracs and stock springs put 3.91s in
We will see what happens my 60 ft is horrible. I am shooting for 12.20-.30s

-Cody