I didn't rebuild the top and bottom end of the motor, I just swapped out a cam, so it isn't the cam plug.
I did have a box fan in front of the radiator, a powerful one too.

I've checked over the back of the engine, and it doesn't seem to be coming from the distributor or intake. I've looked it over pretty good, it's really weird because if it's coming from the rear main seal or pan gasket rear I would expect it to be all over the flywheel, but it isn't, it just drips from the bottom edge of the bellhousing.

If it was the rear main seal, and not the pan gasket, wouldn't it leak when I'm priming the engine and put pressure on the oiling system??
maybe I should try priming it for a really long time and see if anything leaks.