1956-1957 Chevy Impala Small Block 283 AC Compressor Brackets PRIMEDThese 1956 1957 Chevy Impala Small Block 283 AC Compressor Brackets are original GM parts that have been media blasted and primed. The bracket set does NOT include the hardware to mount the brackets. The brackets may or may not have used bushings. Has been modified to also fit 1956 AC Compressor (see last image).