Power Steering

Can't remember if the '66 steering box mounts the same way as the later steering boxes do. If so, find a cop car box and pump set up. Looking under the hood, the full cop car rig will have a cooler loop on the pump.

The low tech solution is to go to a smaller diameter steering wheel. It will reduce the leverage you have over the steering box and make things a little less touchy. The Tuff wheel was 13 inches in diameter. Compare that to what you're running now as a reference point.