Biohazard

Did you leave the tranny in?

Makes it a lot harder if you did and opens the chance of breaking the front pump gears or at a minimum it tends to crook the front pump bushing and will lead to instant trans fluid leakage and bushing failure when you put it back together.

I always remove the flex plate bolts and leave the convertor in the tranny or pull the engine and trans together.

Looks like some of your freeze plugs are leaking and now is a good time to replace them.

Good luck and Keep plugging at it.