There are tons of parts on Ebay for your car, that's where I get most of my stuff. They have fuel tank combos on there, tank, straps and pickup for $150.
Good luck on your build and welcome.
As long as the cylinders weren't in the elements, it should be OK to spin it over with an oil change, rings will clean rust off the walls. May need new rings after that, but may not. Rebuild the carb prior to firing and make sure the ignition is good. The carb is bad after sitting for that long. You can dump gas down the carb to fire it off, but that is a fire hazard, but I have done it that way just to see if it runs.