My vote would be for a Richmond 5 speed. Non overdrive. Use a 2.73 rear and drive the snot out of it. That is what I have in my wagon. I have 2.56 gears. Too tall for coming off the line. Ask MShaw, I gave him a ride recently.
You are building up this 250 and it will start to make some power. The torque rating on a T5 is not that high. I believe it was around 300 ft lbs.
The Richmond is 450.
If you put in a T5, you may be replacing them if there are problems. This makes your cost go up.
