i have a 1975 Chevy C10 and I finally have money to fix it (I think this is tech related because this is technology!). Any ways, long story short, it turns over and it'll even run (with oil pressure and all) but as soon as I stop twisting the key into the run position it dies. Btw, I changed the fuel filter, the oil is fine (not great, but fine), and I put brand new gas in the other day (about 4 gallons). Smoke was coming out of the exhaust with nice good puffs every revolution (it was really satisfying to see, even though it's not running great yet) and a couple time after letting go of the key, a puff of smoke would come out of the carb... not sure what any of this means which is why I'm here. Any help is appreciated.
p.s. if i wasn't supposed to talk about this here... whoops... I couldn't find the car topic that I thought i've seen here before.