Have been following this form. Want to put 4spd overdrive in a 66 C-10 250 6 Cyl. 3 spd. Does anyone know if a Chevy Np 4 spd. overdrive Transmission from a 6.2 PickUp will simply bolt in? Does this have a side mount or a top loader shifter? I have read mentioned about long and short input shafts. Would this be a corse or a fine threaded shaft? The 6.2 is more than likely a diesel. Will this make a difference? Any information will be greatly appreciated.
