55.2-59 Engine Maintenance

[2bo.c10]

Hi Everyone, Got the ol' girl started today after finishing the brake system and I'm getting a bit of thin smoke out of the exhaust. I havent started the truck in about a month but I was getting the thin smoke then too. What are some "tune up" things I can do to ensure the engine is running in tip-top shape and try to figure out how to mitigate the smoke? The smoke is "thin" and its hard to tell the color - its not black its grayish- white...