Hey, Adam;
By the looks of the machine, it's most likely an ST300D, making the transmission a 7000 like Andy said. The points/condensers in these go bad on a regular basis, especially if they've been sitting a long time. You can get gasket/seal kits from manufacturerssupply.com and find other parts on ebay, Richard's Relics or through this site. Where are you in VA? I live up near Winchester.
Don
Stuck in the seventies- not in the swamp.
(6) Attex, a Hustler, a Super Swamp Fox, (2) Tricarts, (3) Tri-sports, a Sno-co trike, 3 Dunecycles, and a Starcraft! ...so far