Any chance that the Delco 45G13044 would work as a rear spring rear shackle for a 1/2 ton? Looks pretty similar except for the lack of center bolt.
Shackles are different between front and rear springs. The differ in the length of the shackle (rear has longer side bars.) But I suppose you could use a front shackle on a rear spring. It would drop the rear of the truck by maybe 1/2" (WAG.) The bushings on 1/2 ton shackles are the threaded ones. The fixed mount to the frame (rear of front springs and front of rear springs) are the smooth bushing and bolt with grease fitting in the end.
