bit of a dilema here... I'm looking at a '73 K5 with a 6' lift and a 396 BBC, th350/np203. If it get this, should I put the raptor in with a np205 (come with truck, org mated to an sm465) or should I go with a hd th400 that I have that needs a rebuild? the th400 to np205 conversion costs like $450 and no OD. however, the truck has 3.73's in it running 16x35x15 boggers, so if i go with the OD then I need new gears. Any suggestions? Troubles I'll runn into? What about the driveshafts do I need to know when doing the swap? Thanks Pete '89 GMC Jimmy- 355, 700r4, 6" Front springs, custom 6" rear shackle flip, D44 w/10 bolt knuckles, 14FF rear. Need- Raptor, Ox locker, '73 tub, ect.