Now it has been some time since I did the swap on mine, but I do recall that the non ac core is much different. I believe the major difference is the houses or spouts that come off the core itself are shaped very differently. I believe the bottom hose on the ac version is much longer. Someone else can probably give you the specifics, but I do know they are different.
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2001 GMC 2500HD Crew Cab Duramax, Allison, 4WD, Love it
1971 Chevrolet 1/2 ton 2WD Short/Step Side. In process of frame off restoration
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021.
"I can't complain, but sometimes I still do. Life's been good to me so far."
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