The nv3500 and nv4500's are truck transmission with granny low 1st gear.

I have a nv4500 in my 99 Dodge diesel that makes over 1000ft lbs to the rear wheels and it hold up great...They make short throw shifters and many aftermarket upgrades.Clutch selection is HUGE.

With that said,I would not be putting either one behind a gas engine unless you are towing heavy with it all the time.