Oil pan options for '99 Magnum 360

Spoke with Art at Mancini, he said "any 360" pan should work, I would just have to seal the corners where the step is.

He also told me there was an "odd ball" year of the magnum, can't remember what he was referring to,. but my front and rear seals are different diameters - the rear is smaller.

Could I solve this with a different gasket that has a taller rear seal?