I’m running these NAPA shocks (p/n 76817) on the front of my 1960 GMC (1975 front suspension) and they work great:
http://www.napaonline.com/Catalog/Ca...817_0404905421
Back when I bought mine they were painted white (and have since been painted black). They were installed in 1997 and still work like new. 3 years ago I thought maybe they were too stiff, so I swapped them out for a new set of standard Gabriel Gas Ryder/Sport Ryder replacement shocks.
Those lasted one day. The ride was dreadful, like having no shocks at all. The truck handled like a 48 Pontiac on a straight road, and rebounded 3-4 cycles after easing over speed bumps. The smaller shocks also made the truck feel like the sway bar had been removed.
I have no recommendations for rear shocks as I’m stuck with what I can find for rear shocks because of the odd mounting arrangement on 60-62 rear suspensions.