I'm in the middle of swapping a 4.3 vortec, 4l60e, and a gm rear axle (all came out of a 01 GMC jimmy). When I can afford to I'll change the 4l60e to a nv3500. As of current I'm In the process of cutting the firewall and floor for the transmission and the only headache I have with it is relocating the steering rack. Before anyone says I picked a terrible engine/tranny/rear end. Keep in mind I'm funding this whole project while still in highschool so my choices were limited. I'm using the cards I have been delt. I'm currently in college classes at my highschool for welding/fabrication so I have the ability and means to fabricate the transmission/driveshaft tunnel and mounts for the rear axle. Currently waiting on the steel for the rear axle mounts, for the 4 link, and the tunnel. Don't worry I will strip the paint and repaint the engine bay and get all of the gunk out of the floor.