I'd go with the R12 if you have easy access to the stuff. Works much better in the system designed for it. That's what I'm using in my 1980, but I inherited a new 30lb canister of R12 never opened. So there's that.....LOL
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2001 Pontiac Trans Am WS6, 6-Speed, LS6 block, TEA LS6 heads, 4" SCAT forged crank, SCAT H-Beam rods, 226/234 cam, McLeod RST clutch, SLP Lid, SLP Power Flo Catback
1980 Pontiac Trans Am Y-84 Bandit WS6, 455 (.030 over), #96 Heads, Hedman headers, Wolverine 234/244 cam, Performer intake, Holley Sniper
"Need a car to run blocker. Speedy car. Speedier than that....."
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