anyone done this before? i automatically assume i will need a custom driveshaft, since the wheel base is ~10 inches shorter from a RCSB OBS chevy. my truck is a 1989 K5 with an 8.5 10 bolt and i have the opportunity to pick up a 14 bolt and a 44 setup from a 3/4 ton chevy. anything else i will need to know other than the DS? (i already know about the wheels)