This is a USED Quick Change Center Section. It is a Benson Front Loader Magnesium. It has had a lot of welding see the last few pictures.
Quickchange Center Section Halibrand 301W Aluminum Sprint IMCA Model A RAT #2
Quickchange Center Section Aluminum WINTERS Sprint UMP IMCA WISSOTA ASA K&N Rod
Quickchange Center Section NON Q.C. CAE Midget Sprint IMCA RAT Rod Vintage
Quickchange Center Section Aluminum WINTERS End Bell 6383-0 UMP IMCA WISSOTA K&N
Quickchange Center Section Side Bell Benson RH71 Magnesium IMCA UMP WISSOTA K&N
Quickchange Center Section Magnesium Frankland Sprint UMP IMCA WISSOTA ASA K&N