Engine "click" noise-Need some help

[Fred K-OR]

It is the old junior Model A guy when it comes to these kind of problems. Would like some help trying to pin down this problem.

My engine in my coupe has a "clicking" sound in it as opposed to a "knock". I have tried the following to try to pin it down:

1. Grounded out each spark plug-not change in sound.
2. Changed out the distributor from a two part shaft type to a single shaft type-no change.
3. Took out the timing pin, turned it around, stated engine and had running and then pushed the timing pin against the timing gear-no change.
4. Rechecked the timing.-No change.
5. Took the fan belt off and ran the engine-No change.
6. Purchased a HF listening thing and tried to listen for the sound. Checked a number of places on the engine and not knowing what I should be hearing, did not find much of a noise location except when I put it on the distributor, it seems to make a little different sound.

So I have run out of ideas as to what to do next. The sound seems to be not as loud when the spark is all the way up. Does anyone have any more ideas as to what I could check? Would appreciate any ideas.