I just started my 79 C-10 today after over a year of sitting.
Could very well be that by the time the fuel gets to the carb it will be oil primed
After a year of sitting, it sure was not happy about coming back to life.
And I'm still not sure if the wet spot near the drivers fuel tank is a rotted fuel hose or serious condensation in a muffler that blew last year.
I'll check it later---too damn hot outside this weekend.