Your going to need 80-up V8 frame pads(maybe engine mounts too, not sure though,) the tranny will bolt to the stock 82 crossmember, and I think the driveshaft would fit, but, the stocker should work if you change the yoke, if they are the same legnth. You almost have to have the engine in before you can tell. I know that LWB 2wd 80-86 trucks only use one legnth driveshaft, and I'm running a rear drive shaft out of a 78 F150 4x4 SWB in my 82.
Evan