Is NAPCO cast into the front axle in any place? If not, you don't have a NAPCO. The car power steering gear boxes are made to mount on the inside of the frame rail, whereas the truck gear boxes are made to mount on the outside of the frame rail. If you care to discuss the conversion process on a '60-'66 Chevy/GMC 1/2 ton or 3/4 ton 4x4 truck, we have done several and able to provide some technical support.
