Specs/Data needed for 68 3/4 ton

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I just picked up a 68 3/4 ton Custom Camper edition truck for a song. $500 bucks! It has the factory original 327, 4 barrel, 3 spd on the column and thats about all I know about it so far. I did see a plate on the drivers door that said 7500 rating. My questions are many but need good data. What is the horsepower? Torque?
What about hauling and towing capacities? Rear end options?

The truck runs great! Really bad gas milage so the rear must be really low. I drove it about 70 miles home and used a half tank of gas. Body is in great shape with the exception of one cab corner but typical. Everything works on it...lights, gauges, wipers, etc.

Any thoughts of what it is worth with a moderate restoration?

Any idea on any rarity to this truck?

Yes I did a search on most of these topics but didn't find any real helpful data...any Chevy truck brainiacs want to ring in?