Agreed on the header option... on a work truck/hunting rig, its just not worth the hassle of constant exhaust leaks (expect to tighten all the bolts weekly, if not more). My 2 cents, if it were mine... I'd be on the lookout for a Mopar 360 long block at the local u-pull it. a refresh with an edelbrock performer cam and intake would seriously wake up the truck and work wonderful with the carb you got. Plus, it would bolt right up to the existing drivetrain. That being on the wish list, just start with simple tune parts... cap, rotor, wires, plugs... and yes, rebuild the carb! as to the gas, i would hate to drain it too! you might pour some heet (water remover) in there and just run it for a bit... I had the same issue with a '95 chevy 2500 that had sat for 15 months... just knuckled down and ran it till it ran right!
Bottom line on gasser recovery order of ops... If it even LOOKS like it might leak, replace it(hoses, etc). If a fluid is in any way questionable, change it. Ignition parts for optimal efficiency, and a carb rebuild to deal with the bad gas issue (and the heet!). Accessory drive belts would not be a bad idea. If you have a timing light, set the timing to stock (not sure of spec for this vehicle) and then advance till you get pinging, then retard about 3 degrees. If you have a vacuum guage, you can tune the carb (looking for appx. 14" vacuum). Check brakes for safety, and do a full bleed for fresh fluid once all leaks are addressed. This is just an off the cuff list of what I've done pulling some old hotrod out of a field in the past. If you have some more specific questions, feel free to PM. Best wishes in getting it on the road ASAP!
JP