Ticking noise, 383, can't locate the source

Hey,
Just read the whole thread, Hopefully Im not sending you guys in the wrong direction.....but sometimes if you are running a mechanical fuel pump, as it starts to fail, it jumps off the lobe on the cam and slaps back down. This can resonate to different parts of the engine making it tough to track. I find the stethascope tool with the pointed end to be helpful. or a long screwdriver. Sorry if this is off kilter or lame info....I have been fooled by a failing fuel pump before though. You might be electric.