I did this one time… more weight than that I’d bet

the service bed was full of tools, 2 30 gallon oil tanks, air compressor, etc. That’s the same basic truck but long bed instead. Truck had rear helper air bags on it with 100LBS of air in them. We only took it about 5 miles to another shop the company owned.
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ABM #2399 2SS/RS:SOLD
ABM #93 2SS/RS Black Rally stripes, Titanium Interior 4,000 miles: GM GFX side skirts and diffuser waiting on paint, GM dovetail, GM heritage, RPI ZL1 style splitter.
‘87 IROC-Z Iroc blue. all original unmolested with 50K miles.