Wehrli 73-87 GM Square Body Chassis w/ Duramax Engine Swap (Allison/ZF6) Trans Crossmember

So, you've decided to ditch the boat anchor 6.2L or 6.5L diesel or the old SBC or BBC under the hood of your square body pickup. You love the way your truck looks and how you feel behind the wheel of it...but also like to be able to merge into traffic and occasionally pull a trailer or haul something heavy in the bed. You could have gone LS swap, but really like the power delivery of your newer diesel pickup and have decided that a 6.6L Duramax will give you the best of both worlds - classic looks with modern performance. Once you've got the donor engine sitting in the chassis (check out our mount kit WCF100173), the next order of business is to back it up with the right transmission to help put the power to the wheels. The WCFab Transmission Crossmember kit provides what you need to bolt up an Allison 1000 or ZF6 trans to a Duramax Diesel Engine in your 1973-1987 GM 3/4 or 1 Ton C/K Square Body Truck Chassis (Chevy C20, C30, K30). Bolt in transmission crossmember for Allison 1000 5 or 6 speed automatic or ZF6 manual to factory location at frame rail. Provides Driveshaft Clearance for Up to 6” of Suspension Lift. Intended for use with NP205 Transfer Case and Advance Adapters Conversion Kit in 4WD Applications. Recommended for use with LB7/LLY/LBZ/LMM/LML Duramax HD Engine Swap Mounts for 1973-1987 Square Body Chevy Chassis (WCF100173).

This Part Fits:

Year	Make	Model	Submodel
1975-1981	Chevrolet	K20	Cheyenne
1981-1986	Chevrolet	K20	Custom
1975-1980	Chevrolet	K20	Custom Deluxe
1981	Chevrolet	K20	Deluxe
1975-1986	Chevrolet	K20	Scottsdale
1975-1983,1985-1986	Chevrolet	K20	Silverado
1973-1974	Chevrolet	K20 Pickup	Base
1973-1974	Chevrolet	K20 Suburban	Base
1981-1986	Chevrolet	K20 Suburban	Custom
1975-1980	Chevrolet	K20 Suburban	Custom Deluxe
1981	Chevrolet	K20 Suburban	Deluxe
1975-1980,1982,1984-1986	Chevrolet	K20 Suburban	Scottsdale
1975-1977,1979-1980,1982-1983,1985-1986	Chevrolet	K20 Suburban	Silverado
1977-1981	Chevrolet	K30	Cheyenne
1981-1986	Chevrolet	K30	Custom
1977-1980	Chevrolet	K30	Custom Deluxe
1981	Chevrolet	K30	Deluxe
1977-1986	Chevrolet	K30	Scottsdale
1977-1986	Chevrolet	K30	Silverado
1973-1974	Chevrolet	K30 Pickup	Base
1988	Chevrolet	R20	Cheyenne
1987-1988	Chevrolet	R20	Custom Deluxe
1987-1988	Chevrolet	R20	Scottsdale
1987-1988	Chevrolet	R20	Silverado
1987	Chevrolet	R20 Suburban	Custom Deluxe
1987-1988	Chevrolet	R20 Suburban	Scottsdale
1987-1988	Chevrolet	R20 Suburban	Silverado
1989	Chevrolet	R2500	Cheyenne
1989	Chevrolet	R2500	Scottsdale
1989	Chevrolet	R2500	Silverado
1989-1991	Chevrolet	R2500 Suburban	Scottsdale
1989-1991	Chevrolet	R2500 Suburban	Silverado
1988	Chevrolet	R30	Cheyenne
1987-1988	Chevrolet	R30	Custom Deluxe
1987-1988	Chevrolet	R30	Scottsdale
1987-1988	Chevrolet	R30	Silverado
1989-1991	Chevrolet	R3500	Cheyenne
1989-1990	Chevrolet	R3500	Scottsdale
1989-1991	Chevrolet	R3500	Silverado
1987	Chevrolet	V20	Custom Deluxe
1987	Chevrolet	V20	Scottsdale
1987	Chevrolet	V20	Silverado
1987	Chevrolet	V20 Suburban	Custom Deluxe
1987-1988	Chevrolet	V20 Suburban	Scottsdale
1987-1988	Chevrolet	V20 Suburban	Silverado
1989-1991	Chevrolet	V2500 Suburban	Scottsdale
1989-1991	Chevrolet	V2500 Suburban	Silverado
1988	Chevrolet	V30	Cheyenne
1987-1988	Chevrolet	V30	Custom Deluxe
1987-1988	Chevrolet	V30	Scottsdale
1987-1988	Chevrolet	V30	Silverado
1989-1991	Chevrolet	V3500	Cheyenne
1989-1990	Chevrolet	V3500	Scottsdale
1989-1991	Chevrolet	V3500	Silverado
1975-1978	GMC	K25	Base
1975-1978	GMC	K25	High Sierra
1975-1978	GMC	K25	Sierra Classic
1975-1978	GMC	K25	Sierra Grande
1975-1978	GMC	K25 Suburban	Base
1975-1978	GMC	K25 Suburban	High Sierra
1975-1978	GMC	K25 Suburban	Sierra Classic
1975-1978	GMC	K25 Suburban	Sierra Grande
1973-1974	GMC	K25/K2500 Pickup	Base
1973-1974	GMC	K25/K2500 Suburban	Base
1979-1986	GMC	K2500	Base
1979-1986	GMC	K2500	High Sierra
1979-1986	GMC	K2500	Sierra Classic
1979-1982	GMC	K2500	Sierra Grande
1979-1986	GMC	K2500 Suburban	Base
1979-1986	GMC	K2500 Suburban	High Sierra
1979-1986	GMC	K2500 Suburban	Sierra Classic
1979-1982	GMC	K2500 Suburban	Sierra Grande
1977-1978	GMC	K35	Base
1977-1978	GMC	K35	High Sierra
1977-1978	GMC	K35	Sierra Classic
1977-1978	GMC	K35	Sierra Grande
1973-1974	GMC	K35/K3500 Pickup	Base
1979-1986	GMC	K3500	Base
1979-1986	GMC	K3500	High Sierra
1979-1986	GMC	K3500	Sierra Classic
1979-1982	GMC	K3500	Sierra Grande
1987-1989	GMC	R2500	Base
1987-1989	GMC	R2500	High Sierra
1987-1989	GMC	R2500	Sierra Classic
1987-1991	GMC	R2500 Suburban	Base
1987	GMC	R2500 Suburban	High Sierra
1987-1989	GMC	R2500 Suburban	Sierra Classic
1990	GMC	R2500 Suburban	SLE
1987-1991	GMC	R3500	Base
1987-1989	GMC	R3500	High Sierra
1987-1989	GMC	R3500	Sierra Classic
1990-1991	GMC	R3500	SLE
1987	GMC	V2500	Base
1987	GMC	V2500	High Sierra
1987	GMC	V2500	Sierra Classic
1987-1991	GMC	V2500 Suburban	Base
1987	GMC	V2500 Suburban	High Sierra
1987-1989	GMC	V2500 Suburban	Sierra Classic
1990	GMC	V2500 Suburban	SLE
1987-1991	GMC	V3500	Base
1987-1989	GMC	V3500	High Sierra
1987-1989	GMC	V3500	Sierra Classic
1990-1991	GMC	V3500	SLE