1940 Chevrolet Truck Data PDF (extract below) shows your serial number sequence beginning with 7000001 was used to identify 1940 MKT-134 Crash Box 4 speeds which where optional in 1/2 thru 3/4 ton trucks and standard equipment in Conventional Heavy Duty trucks, School Bus Chassis and COEs.
Perfect original year correct optional 4 speed for your 1940 1/2 ton if that's what you want to use.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
