[Volfandt]

Looks like he stayed close to stock and did a frame off restoration.
From the pics it looks like he did a very good job in all aspects.

I'll swag the engine is a 235 (or possibly a 261) but either is good, with a 1bbl Rochester carb, oil bath air cleaner and a generator.
With that combo you can comfortably cruise in traffic at 60 mph and in bumper to bumper. If he upgraded the rearend ratio from 4:11 to 3:55 you'll comfortably cruise at 65/70 on the interstates.

Based on the pics it wouldn't be a stretch to say there's some serious $$$'s he invested in restoring that truck.

Needless to say, if it were mine I'd do like previously stated to clean and wax it up, change the fluids, go through the brake system and find where the fluid leaked out, repair it then enjoy cruising it as is.