That one might not be a 3/4 ton- - - -the dual rear wheels most likely make it a 1-ton, or possibly a Frankenstein cobbled up out of mismatched parts. The bed is a pretty scarce option, looks like a factory flatbed. I'd also be surprised if it's got a 3 speed transmission. Anything of 3/4 ton or larger will have a SM-420 4-speed. Depending on the price, it looks like you've got a very restorable rig there, or maybe a daily driver in "as is" condition with just a little tinkering.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!