OK, we got the Manual transmission, and we got cheap, what we didn't get is how many gears... 3, 4, 5, 6? What are you looking for. Be well aware that any manual transmission you will find for that HP and torque rating won't be cheap.
My short list would be
Super T10 with Borg Warner overdrive(4 speed with an electric OD)
A833 or MY6 (New Process 4 speed used by dodge and gm with an OD)
NV4500 5 speed (granny low and overdrive)
Tremic or kieseler 5 speed
I would not use
a T5
Muncie M21 or M22 (no overdrive although I have heard the cluster can be changed out to get an OD.
Saginaw
sm420
sm465
My reccomendations are for some of the stronger transmissions with OD, which will be important with the 3.73 gears.
