Rack and pinion conversion is fine for a drag car, the slow steering some complain about is not a bad thing for that application. You should be able to adapt something from a Pinto/Mustang II or even a Fox-body Mustang. I've heard Datsun 240/260 Z is possible. If you insist on Sticking with GM, Chevette or Fiero are pretty close to the right width. Be carefull in your junkyard hunting; almost nothing from a FWD vehicle will fit work. They're all "rear-steer" and actually turn the opposite way.
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
72 Vega HB Drag Car -383/'Glide/9"(firstname.lastname@example.org)(email@example.com 1/8th)
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
03 Silverado 2WD ex.cab (work truck/parts hauler)
04 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
93 Suburban- 350/4L60(retired)
00 Saturn SW2- wife's car
01 Saturn SC2- younger son's project
00 Saturn SL2- daughter's car
00 Saturn SL1- older son's ride
98 Saturn SW2- spare
and 3 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....