Yeah the MP deep pan isn't exactly flat, might have to belt sand it like I do with them Chinese Fab aluminum Valve covers.

It only seems to drip with the Mopar 'o ring reuseable ' gasket in the very front (where the gasket is for some reason much thinner).

Theres not a huge selection of Cast Alum pans for the 904, not like the 727. It shouldn't cost $150 of new parts to stop a leak, you wouldn't think, lol.