Dave - Do you know if the balancer (which I assume is the pulley/thing the belt goes around) from a '61 truck engine works with the pump you're talking about?
Was reading your site. It says"
Caution: I do not recommend using the 1955-62 passenger balancer since the pulley is larger and may turn the fan too fast, leading to cracking. (to identify this balancer, the pulley is 6 3/4" OD X 5/8" outside to outside edge).
Are those dimensions for the car pulley or the truck pulley?
Yes, the identification is for the pass balancer, ie the one not to use.
The truck balancer will works great.
