Use With The Gen IV Air Conditioning Units Includes Front And Rear Compressor Attachment Plates Includes Water Pump Brace Plate Includes 4 1 OD and 2 3/4 OD Spacer Tubes Includes 1 1 OD Idler Pulley Mount Includes All Fasteners Required To Mount Bracket To Engine And Compressor To Bracket Includes Idler Pulley When installing a Chevelle LS Engine in your Classic car you will be required to order this bracket kit. This kit will give you all the needed brackets to mount the compressor and other optional equipment.