John Z. is absolutely correct that GM (Chevrolet) never made a (production) cut and wielded pan. However Chev. did make a cut and wielded deep sump pan you could buy over the the counter, used with the following parts:
#3879633... 6qt...deep wielded sump...plug on driver side.
#3879640...semi circular windage tray (Corvette discontinued late 70) I think #3967854 is the later flat version.
#3964255...HD ZL1 pump w/pickup and screen...for deep pan.
This was a drag race pan and not intended for the street. It was used buy the factory teams ( Oh! forgot, Chev. wasn't in racing) and anyone that need a good deep pan for a reasonable price.