This is rather encouraging!
I was definitely under the impression that 75MPH was not sustainable with the original 54 steering, especially mine. It has about an 1/8 of a turn of play in sitting on dry ground! Upgrading steering was already in the plan.

I've never done an electric power steering conversion before so need to learn more. Does it just assist your existing system, or does it replace it? I'm upgrading the motor to either LS or small block and that factory box is in the way of the exhaust manifold. Any recommendations on an electric system?

Grrroger