Rockauto.com has new and rebuilt, power and manual. I put a new cardone box in my '93 Dodge D 300 and have been very satisfied with it.
https://www.rockauto.com/en/catalog/chevrolet,1970,c20+pickup,5.7l+350cid+v8,1031690,steering,steering+gear,7416
Still, the rest of the front end has to be in decent shape and the alignment set properly or it won't go straight down the road even with a new box.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"