How to stiffen up power steering on a b body
 

Hi all. I have a 68 gtx with power steering that is so senstive my grandma could do u turns with her pinky. The steering unit is leaking and I was thinking of finding a way to stiffen it up and maybe get somewhere between manual and power so I could feel the road. Does anyone have any bolt on ideas other than switching to manual?

Thanks in advance