Up for sale is a used but near new 1955 - 1957 PONTIAC “V8” motor single V-Belt groove harmonic balancer! This part is in near perfect condition and can be installed on any Pontiac “V8” motor as is! If you have any questions about this sale please feel free to contact me and I will get back to you as soon as possible. I have many other parts for 1948 - 1959 GM trucks and cars. Thanks again and have a great day!