Does anyome have a reference to check bellhousing casting numbers? I'm trying to figure out what I have here. It's cast iron and has the 50's era crossmember mounts cast in.

The casting number is: 3733373
The date code(?)looks like: L 1 6
Other marks: GM1

I'm really trying to determine what year this is and whether it's a truck or passenger car bell housing. Any help would be greatly appreciated!


Mike
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1958 Chevy 3200 Fleetside
1958 GMC 100 Wideside
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