Not sure who the manufacturer of the bed is. Only history I have was the truck was originally a wrecker, original owner retired and sold that part and bought a salvaged 04 chevy 1-ton flatbed that the cab was burned up and converted this C-30 with that flatbed to a pto driven dump bed.
Have yet to find any markings on the bed except what looks to be a newer than 85 warning label that states the obvious(in so many words): "Don't stick your head under it when it is up"...so to speak.
Gotta love the 1-tons!
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1985 Chevy C-30 Hydraulic Dump Bed
2001 Saturn SC2 (go to work car)
2010 PT Cruiser (wife's car)
"Reality is just a hallucination brought on by lack of alcohol."