idle trouble
 

Wondering if anyone could help me with my current dilemma
recently bought a 1980 k10 and would start right up and run perfectly every time
after about a month of sitting its having real trouble running and even starting now. changed the fuel filter and put good clean gas in it. started right up and let it run for maybe 10 min then started choking and died tried to start it again and could tell it wasn't going to happen and white smoke started coming out of the pipes.
Any help would be appreciated