Talking about that KA Swap.... I owe you the apology of a lifetime.... Two years ago I was going to sell you the swap mounts and oil pan off my former KA Swap so you could finish yours. If you still want them, send me an e-mail to firstname.lastname@example.org and I will set you up with them. I was a real ass about things, and to be honest, that was at a particularly rough time for me. So, I'm sorry and hope to make things right.
i have had a mystery oil leak so bad I don't even drive it anymore, its all over the pan, diff, tire sidewalls, 8 baseball size drips on the ground. cant locate it, the oil level hardly changes and it has zero crankcase pressure. Here is the kicker..... it never drips or leaks when its running, shut it off and it dumps everywhere.
I give up.
Diff oil? Seal, vent tube?
Power wash suspect areas and let dry. Keep regular watch to narrow it down.
Pour some UV dye into the oil and use a blacklight. Works like a charm on those hard to find leaks. I had a hard time with a leak a while back on a customer car. turned out to be a porous aluminum casting and the oil was leaking through the casting. Was in a real bad spot too.