Oil Leak from the back of the engine?

[GSXRolla]

I've got a small oil leak, and over the last couple weeks I've tried my hardest to track it down. It seems to drip onto the ac compressor, and down onto one of the front axels. I've gotten as good of a look as I possibly can, and just CAN'T find it. Where could it possibly be leaking from?

It's not like it's something that just sprung up or just started leaking. I just finished a 6 bolt swap, and it must be something that I either didn't tighten down enough, or some sort of gasket that I missed?

Any insight would be helpful and greatly appreciated.

 

[kalla]

Valve cover gasket is a usual suspect in leaks like this.

 

[blue92laser]

Well, I would say Oil Pan Gasket, as well as the Valve Cover Gasket but you are saying its dripping down on the AC compressor. Oh well, I was no use!