i just bought a 79 Datsun 620 was sitting for 10 years just put a lot of wrench time into it and money when I first got it it did not run. I got it to idle nicely but after aboue 2 mins the engine starts letting some some white smoke probably just stuff on the engine block but thats not wat bothers me wat bothers me is when the white smoke starts from the engine compartment the truck stalls. any ideas?