Not sure on the milage of the 350, it was in the rig when I bought it a few years ago, I only ran it a few times a year.
The Klune V Goliath will bolt up to the back of a TH400 using a 6 bolt round TH400 adapter from a late GM NP205 or 208 transfer case. I have a TH400 and adapter also (not...
Ford drivers drop NP 203/205 doubler, 203 has 32 spline input ( intended for a TH400 transmission) and 31 spline output, 205 has 31 spline input with yokes front and rear. $700
TH400 trans with 205 Chevy transfer case, early 80's 8 oval pattern. front and rear yoke. $350
350 Chevy motor...