Hi Dave,
Too many choices, eh
I've a mildly upgraded C6 behind a 2200 stall EDGE converter. It is very important that the converter match the engine: low stall speed is good for a "healthy" street oriented engine. The Jag rear is a 2.88 Powerlok.
It will blow the tires away at any speed up to and over the ton. I love it.
Just put it in drive and forget about it
The car weighs a healthy 3,000 pounds with me in it.
If you like to shift, go for a clutch & four speed. I find it unnecessary
Regards,
Tom