Rebuilt magnum 360 Noise

DO NOT "pull" plug wires. The voltage spike can kill ignition boxes, but it can also lead you down the wrong path due to crossfire.

Also some ignition systems can be lethal, and even if they "ain't" they can physically knock you silly enough to fall into the fan, etc.

DO THIS Pull/ loosen wires / boots at dist. Get paper clips or small brads, and insert them down beside the wires into the cap towers, or just use a tiny thing probe like a straight dental pick. GROUND your probe and then simply ground out each tower

EXHAUST LEAKS and other noises. Use a scrap of hose, fuel line works well but it can be larger. Also insert it into each valve cover and see if you can localize the noise, and if you can run it without valve covers, listen around each valve, rocker.