Does the spark plug wires go clockwise or counterclockwise on a 350 Chevy motor?

There's no universal clockwise or counterclockwise rule for spark plug wire routing on a 350 Chevy small-block engine. The firing order determines the routing, and that firing order is consistent for a given engine configuration (though there are some variations depending on the year and specific distributor).

You must consult a diagram specific to your engine or a reliable repair manual for your year and model of vehicle. Getting the spark plug wires incorrectly routed will result in misfires, poor performance, and potential damage to your engine.

Trying to follow a general clockwise/counterclockwise rule will almost certainly be incorrect and lead to problems. Find the correct firing order diagram and follow it carefully.