Hey joes68340, I have a GV in my '70 Cuda, for about 2 years now, no problems, as said above, some floor clearancing, stock crossmember and mount, driveshaft is kind of short, but a couple thousand miles so far.
My trans has a reverse manual valve body, so I don't have the speedo cable hooked up, I activate the unit with a toggle mounted on my Pro Stick housing. I have a 4.56 gear, 295/60-15 tires, and cruising at 70, rpm's are at 2800.


1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.