Can anyone tell me the exact depth of a trs drive? Center of driveshaft to center of prop shaft? Or how much shorter a number V is over a trs. I know the v is 18.687 I just do not know the trs depth?

Drive shaft to prop shaft center to center is approximately 25 1/2".

On a TRS? That's more than a B2 and a SSMIII.

Sounds about right. I remember a SSM III being like a inch shorter than a TRS, and a SSM IV/V being about 5.5" shorter than a III.