I'd get a vacuum gauge and connect it to your intake manifold, adjust the distributor to highest vacuum. Adjust the lifters when motor is up to temperature, also should be several good tech tips re. adjusting lifters on this forum.

Beautiful truck BTW, the blue and black is an eye catcher!

Last edited by JiMerit Boltr#43; 03/31/2023 3:43 PM.
It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed