I'm also new to this site, but not new to old cars.
First, you bought a cool old truck at a reasonable price and it looks pretty decent.
Here's my advice:
Don't spend any money until you have a plan. Spend your time and energy figuring out what you actually have. You stated that it may have started as recently as 3 years ago. You may very well have a "runner." A 12 volt conversion might be in the future (it's not that difficult, but the cost of battery, alternator, etc. all ads up), but if you can get it running as is, you might be able answer a lot of questions: does the clutch work? does the transmission shift? do the brakes work? is the wiring rotten, etc.?
(The split rims are a bummer, but deal with that later.)
If you can get it started, running, and be able to drive it down the alley, your opinion about it may change dramatically. You may decide you love it, you may decide you hate it. Figure that out before you open your wallet.
Post some pictures of the engine compartment, wiring, suspension & the interior, dash, etc. I'd love to see more.
'49 Chevrolet 6400, Mater
"I'm not very good, but I'm really slow."