SROD

A Tremec 3550 or TKO is a bolt up to your SROD bellhousing. The 3550 takes the standard Mustang clutch assembly, while the TKO uses a 26 spline chevy clutch disk. The TKO also uses a different yoke on the driveshaft end. I have a Tremec 3550 and it is bullet proof as long as you don't do things like let it run low on lubricant or try shifting without the clutch.
 
I don`t know how much torque an SROD can handle,but they suck for performance use.4th gear is overdrive in an SROD.

Here`s the ratios...

1st-3.07
2nd-1.72
3rd-1.00
4th-.70
Reverse-3.07