This is an 8 inch harmonic balancer that I just took out of my 1955 Chevy, that had a 1996 Chevy Votec 350 engine, It was working just find but when I added power steering, to my 55 Chevy, it wouldn't fit, so I replaced it with a 6.75" harmonic balancer. It is in good working condition and includes the two keys pictured but notice the gap where some rubber has peeled off (see pictures). This harmonic balancer will work in a number of different Chevy engines and years. If this ad is still showing the item is still for sale. Once it has been sold the ad will be removed so please don't ask if it is available.