compressor is on this 64 buick riviera with a 425 , the pulley spins freely and when u turn the clutch u can hear the valves, it will prolly need a rebuild but they make the kits, if you need a correct compressor for your restore then this would be perfect, you are bidding on the compressor only, the brackets will be on another listing, this same type of compressor was found on a lot of gm cars in this time period