deeper than stock oil pan

Back in the day people used to make / modify them. Cut out the bottom and add a new bottom section cut off most anything that will fit. Braze, gas weld. Bolt it to something flat, even and old block to control warp. Go easy on the heat. Figure how to extend the pickup

In 75 when we swapped what had been my 440 into my friends nearly new 74 Dodge short box 4x4, we cut the pan off, turned it around, and turned it into a rear sump with the help of a junk pan. We thought it would be a good idea to order a factory pan "for the baffles," so 45 bucks later and a 2 month wait, the legit pan came--and it HAD NO BAFFLES.
That rat there ^^^^^