Deep sump oil pan
Me and my buddy built a custom pan for a 360 we but in an Arrow.
We had to move the location of the sump and make the sump deeper.
It is not that hard if you have alot of time on our hands and can TIG weld so you dont warp the crap out pan rails, and have an old engine block to bolt it to while you weld.
We used 3 stock oil pans to make one.
Lots of time involved R&R the motor several times, but you could not buy a pan that fit.
Do our self a favor and buy a new one or put an add in the want adds and pick up a used one, this is a common part for our car.