Power assist steering might help- Basically its a hydraulic piston attached to the centerlink which give you a little boost when you start turning the steering wheel in either direction. They are a bit spendy, but a few people have posted on this site saying they love it.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi