suspension..... air, rubber, leafs, or coils ?

[HappyCPE]

I think you're right, but my first brand new pickup truck was a 1969 half ton, short bed Chevy; cheapest thing available at the time, and it had coil springs under the rear end. That same year, an uncle also bought a new 1969 Chevy, but it had the long bed and leaf springs.

Bird, your truck was an exception. The "lightest" duty GM trucks had coils.
If you had it now, it would be fairly valuable - they make cool hot rods.