Noisy V6, any clues?

Took the E out for a run yesterday.  After about an hour I heard a squeek like a bearing coming from the engine, after a while it got louder so I pulled overand it seemed to be coming from the distributor area. 
 
Assuming it was a fan bearing I got home then took the belt off to check, but the noise is still there, so it cannot be fan or alternator. 
 
I pulled out the distributor thinking I may have a broken tooth on the drive gear - common, but no, gear all good. 
 
I then cranked the engine over for a while, no noise.
 
I pulled the fuel pump out to see if the actuator arm lost its platsic block, but no all good
 
I pulled the left rocker cover off, all looks in order.
 
I guess next is Timing cover to check the gear and cam retaining bolts
 
The only other variable that comes to mind is the Oil pump Drive Shaft may have rounded and spins under load, but there has not been any drop in oil pressure, but the engine does have an odd miss at idle, runs sweet at revs
 
Got me buggered, anyone got any suggestions?

Good call, the dizzy main shaft has a bit of slop, i'll get it bushed.
 
I have removed the oil pump drive, its not rounded off
 
Tomorrow the timing case, or tonight if I get motivated

Have to agree with Matt on this one JR. The distributor will make a noise like you have described. I have had a few Windsors make the same noise too. Either get it rebushed  if it is shagged or lube it up. Good luck.
 
Cheers, Craig.

The dizzy needs regular oiling so as others have said that would be my first guess too.  If oil in dizzy doesnt stop it then my next guess is a cam bearing.

Just stripped the distributor, there was about 1mm of end float in the main shaft, I replaced the washers under the shaft at the head end also put one under the gear, very nice now, and I have used copper washers so they should bed in.  Next job is the electronic conversion, hopefully this will sort me out