The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1967 GMC V6

factorystock · 07-07-2019, 01:00 AM

The V6 was all about ruggedness and high torque at low rpm's, similar to the characteristics of a diesel engine. These engines got fairly good gas mileage in a 1/2 ton with standard 3.07 ratio. When in a 3/4 ton with 4.10 ratio, gas mileage was average, when in 3/4 ton or 1 ton with 4.56 ratio, gas mileage was poor. IMO, a 351 with the 3.54 ratio would be a great performer with good gas mileage. The biggest problem is that these engines have been out of production for over 50 years and parts are difficult to find. The cost to rebuild will be very expensive. If you really want to keep a V6 for the uniqueness, I would be on the look out for low mileage good running V6 truck being parted out, maybe out of a fire engine.

07-07-2019, 01:00 AM	#22
factorystock Registered User Join Date: Feb 2007 Location: west coast Posts: 3,356	Re: 1967 GMC V6 - 351E on a Camper Cruiser The V6 was all about ruggedness and high torque at low rpm's, similar to the characteristics of a diesel engine. These engines got fairly good gas mileage in a 1/2 ton with standard 3.07 ratio. When in a 3/4 ton with 4.10 ratio, gas mileage was average, when in 3/4 ton or 1 ton with 4.56 ratio, gas mileage was poor. IMO, a 351 with the 3.54 ratio would be a great performer with good gas mileage. The biggest problem is that these engines have been out of production for over 50 years and parts are difficult to find. The cost to rebuild will be very expensive. If you really want to keep a V6 for the uniqueness, I would be on the look out for low mileage good running V6 truck being parted out, maybe out of a fire engine.