If you are not going to be able to take the truck out on the road and make the engine do some serious work, I wouldn't start the engine at all. Doing so will only introduce unburned fuel into the crankcase which will dilute the oil every time you start it. Driving the truck on the road vigorously will prevent this from happening.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission