I would move the trailing arm crossmember back 1.5" to center the rear wheel and tire on the wheel well, should have done a 2.5" drop spindle, will do that later...

started with this:

http://kieth.smugmug.com/Trucks/66-GMC/13311086_gRF57#967555158_RNLWE

ended up with this:

http://kieth.smugmug.com/Trucks/66-GMC/13311086_gRF57#1438206593_wLm4dMM-XL-LB


66 GMC SWB
65 Chevy LWB
65 GMC SWB

918-446-2245