i have air and fitech on my 70gto with electric fans. if you dont want to change what you have maybe add a pusher fan controlled by both AC on signal from the vintage air AND a set temp on your EFI. simple relay control can use both signals in order for fan to turn on. you will need a trinary switch on the AC to control fan. EFI usually completes ground on control side of relay when programmed temp is reached.
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Steve
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