Moog part numbers if you want to try to get them locally, Upper control arm shaft kit K6135 or K2556 (Problem Solver with offset shaft for extra camber adjustment), Upper balljoint K680, lower balljoint K6025. My catalog shows no listing for a '65 C20 for a lower control arm bushing kit, but it does list K6147 for the '67-'91. Also of note, if you use upper balljoint K6122 and lower balljoint K6129, you can use the '71-'86 C20 and '87-'91 R20 steering knuckles to get a disk brake upgrade using factory parts. You will also need to use the outer tie rods and I beleive the adjuster sleeves for the later style truck.
There's really no need to "downgrade" your 3/4 ton to 1/2 ton specs to keep it on the road, as it has very good interchangeability with the later model '70s and '80s trucks.
