Rough-idling 360, can't figure it out!

One last thing here MopaR&D,

I swapped out the suspect '76 360 engine with a different good one, using all of the same: distributor, brain box, all wiring, plug wires, cap and rotor, and carburetor.

My idle problem and odd running problem went away, idles like a dream and runs out nice now. So my problem was in the core of the engine.

Everything is leaning to a few cam lobes going flat on the '76 360. Those camshafts are the whole "Run Program" for the engines. When the cam starts to wear out the whole "Run Program" goes out the window.

Good Luck on your Truck !!