Identify crank pulley 1971 360 from Chrysler

I just realized while thinking of adding air to my 1970 Dart Swinger 340 build, (original motor not with car) that the 360 I’m building may have been from an air conditioned car. I took pictures of my crank pulley which appears to have three grooves. Does anyone know what belts the three grooves were for? Hoping to save buying aftermarket pulleys and brackets.

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