oil coming from under head

You will need a mirror to be able to see the injector wiring harness plug/connector at the back of the head area between the firewall and engine,, if it is leaking from there you can do a temp repair (may last up to a year or more) by degreasing the area around the connection then clean with spray can carby cleaner, and let dry, and then spray with silicon adhesive to seal the area.

 

Keep an eye on your oil level. If the leak is bad enough that you can see drip, drip, drip, then that needs to be fixed. If this something that simply power washing the engine once a month will take care of then that is what I would do. I have never tried the spray, but I would like to try it sometime. Minor oil leaks are basically just cosmetic defects. I would wait till the engine needs to be tore apart for a real reason. Taking everything apart and changing 12 gaskets and orings just because one is leaking a bit seems dumb to me. You really aren't "fixing" anything.