I came up with nothing on the PN, but the spring width on 1/2 ton and 3/4 ton trucks is 1-3/4" and 2" on larger trucks. That should narrow down the application.
The bushing measures 2" long by 7/8" diameter. Maybe 1/32" less???
Brendan 1940 Chevrolet 1/2-Ton Pickup Restoring Dad's old truck In the Gallery Forum