USE
1941-52 Harmonic balancer and waterpump for ⅝" belt.
1953-54 Harmonic balancer and waterpump for ⅜" belt.
Note: For ⅜" belt an acceptable substitution is to use a 1955-62 truck balancer. It is designed for a ½" belt but may be used with a ⅜" belt. This will allow the belt to run deeper in the groove and in affect will reduce the diameter to very near the correct size.