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What is the most common swap to attach to the s13 sr20det for a/c

do you guys use s13 a/c components or s14s?


i have a s14 with a 13 redtop sr and the is an a/c component attached to it
and it was working for well over a year but recently it seized up and idk what to do. the pully siezed up and the compressor still holds compression also
i noticed there is a relay wire where the fan switch is suppose to be. is that normal? and my friend has a dohc compresser but its 1/4 more spaced out from the boss 2 the first line on the pully than the one on the car already

what do i do and could someone please help me like step by step
and what is recommended

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