Ok so im buying a 1972 f100 speed 390 that burns oil realy bad how do I fix this problem?
Well if you haven't bought it yet, I reccomend moving onto another truck. A lot of work is involved, and if this is your first project its better to start out small and work your way up.
Burning oil is bad. Normally some form of gasket failure in the motor. Its not worth the trouble. Find a different truck.