Hook up for the heater cores is different on A/C vs non A/C. I haven't payed much attention to their sizes, but I would think they are different. I am sure you could "MAKE" anything fit if you have a big enough hammer and a blue wrench. <grin>
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Chris Lucas
1973 Chevy C-10
1975 Chevy Silverado
Captkaos' Page
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Chris Lucas
1973 Chevy C-10
1978 GMC Jimmy (2WD) - SOLD
1987 R10 twin turbo LS
1991 R3500 SRW CrewCab
1985 K5 diesel swapped project
1989 K5 2WD conversion w/ Vette susp Project
Captkaos Customs
73-87chevytrucks.com