Help tracking down oil leak - front of engine

[zak]

Here's an unusual one -

My car (95 MTX, 115 K, garage kept original owner/engine) has had an oil burning smell on startup. I originally thought it was valve seal time (er, 3.2 upgrade time) but I noticed that the front of the oilpan was wet, right below the AC compressor, and way too high to be the front main seal (front main replaced w/Ford IIRC). It is obviously dripping onto the front of the Y-pipe ahead of the catalytic converter Tracing it up further, there is some dryed/gummy oil right where the front head meets the block.

Obvious suspects are the cam seals (original) or valve cover gaskets (replaced with Felpro at 90 K), any way to narrow down which?

 

[itwonder]

Take off the upper timing cover and it's pretty easy to see if the forward-most cam seal is leaking. Another leak point is the oil pump outlet, which leaks at the block just below the AC compressor; you leak sounds further up though.