When and how should I adjust my valves in my newly rebuilt 235. The factory manual say to normalize the engine and then adjust the valves static.

My rebuilder said to do them with the engine running. Back off each rocker until it clacks and then tighten it until it stops clacking then give 1/4 turn

Which is better?

Also should I drive the truck a while before adjusting them? It runs great now but the engine has literally about 1 hour on it since the rebuild.

Should I drive this a few miles/ hours before I re adjust valves, timing, idle, fuel mix?

Thanks
RB53

1953 3/4-Ton Chevy

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If it can be built ... It can be fixed.

RB53