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You will need at least the passenger side Banks manifold, or you need to modify the AC box, some use an s-10 Box and fiberglass it to fitSent from my iPhone using Tapatalk
I need to add, my truck is an '89. Is the AC box under the dash for those later years?
Quote from: bryanedp9 on May 25, 2016, 07:25:29 PMI need to add, my truck is an '89. Is the AC box under the dash for those later years?1988-1998 GMT400 chassis... Yes. Stock 1987-1991 RV series is the same as the 73-86 CK trucks. In the engine bay. Vintage Air builds their own custom replacement heater/AC box that's installed completely tucked up under the dash. Even the blower is re-located to inside the cab.