3:50 DAM! Eh eh, that thing is all ready a "tire smoker". You must use 2nd to take off.
Richmond would have an ultra low 1st gear ratio, useless with a 3:50 rear (unless your pulling stumps or wheelies). And since high gear is 1 to 1, no difference in crusie rpm. Nice with a 3:08.
You know, that Tremec would work out OK with that rear gear. Just bear in mind you will still have an ultra low 1st gear (lower than you have now). Hmmmm,,,, an OD style trans, close ratio with a 2.2-2.5 1st ratio would be just the ticket. I don't think they make one!