The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Origin of the "Heavy" Half-Ton?

**Bob B.** · 06-05-2006, 03:40 AM

The Chevy 'Big 10', GMC 'Heavy Half', Dodge D-150 and Ford F-150 all came out about 1976. At the time, catalytic converters were required on all trucks under 6000lbs. GVW.. These heavy duty half tons all had GVW's of 6010-6100lbs., and didn't need catalytic converters. They also still offered big blocks and 4 speeds in many instances.

06-05-2006, 03:40 AM	#5
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,308	Re: Origin of the "Heavy" Half-Ton? The Chevy 'Big 10', GMC 'Heavy Half', Dodge D-150 and Ford F-150 all came out about 1976. At the time, catalytic converters were required on all trucks under 6000lbs. GVW.. These heavy duty half tons all had GVW's of 6010-6100lbs., and didn't need catalytic converters. They also still offered big blocks and 4 speeds in many instances. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.