[CamaroFred]

I'm with Mr Twisty.
2000 is too much, IMHO. There is a lot of torque in the 376.

I don't know what the trans ratios are in the 4L65 but kicking down to 3rd (or even 2nd) for passing should give you some decent acceleration even if you use a taller screw.

If you have 2.52/1.52/1.00/0.70 a 3.73 will take you to triple digits in 2nd.