AC capacities needed and other questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rufas · 10-22-2019, 08:55 PM

I'm finally starting to get the factory A/C in my 1970 GMC back together. The only thing not original is the 508 Sanden compressor. The POA valve has been replace with the POA delete tube years ago. Would it be worth it to go back to a POA valve? They are available rebuilt but are pricey.

I need the coolant capacity of the system. I haven't decided just yet if I'll go with R12 or R134. Since I live in AZ, I want to get as much cooling as possible out of the system. So I'm leaning on using R12. R12 is still available for $20/$30 a can on eBay.

TIA

10-22-2019, 08:55 PM	#1
Rufas Registered User Join Date: May 2016 Location: Fort Mohave, AZ Posts: 370	AC capacities needed and other questions I'm finally starting to get the factory A/C in my 1970 GMC back together. The only thing not original is the 508 Sanden compressor. The POA valve has been replace with the POA delete tube years ago. Would it be worth it to go back to a POA valve? They are available rebuilt but are pricey. I need the coolant capacity of the system. I haven't decided just yet if I'll go with R12 or R134. Since I live in AZ, I want to get as much cooling as possible out of the system. So I'm leaning on using R12. R12 is still available for $20/$30 a can on eBay. TIA __________________ 1970 GMC 2500 700R Trans, RideTech 4 link rear suspension, air bagged on all four corners, factory upper/lower A-Arms, 2 inch drop spindles. 350 SBC 300hp Weiand Supercharger FiTech 30004 EFI



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