ive seen some aftermarket rack and pinion systems online
they use the rack from a ford thunderbird
and a few steering knuckles to get the steeringshaft to line up
there asking crazymoney for a kit (12 to 1400 bucks) but youre pretty good with a wekder and can prolly find a good steeringrack in the junkyard
there some magazine write ups online to show you the way