I looked through my Haynes and it didn't mention anything about tightening up a rack & pinion. That's not to say it can't be done since Haynes does tend to leave out some critical info. I've never heard of adjusting it though -- wouldn't you have to either adjust the depth of engagement that the pinion has on the rack or fatten the teeth of the pinion? Is your rag joint in good condition? Tie rod ends good and tight?
Triple Black '99 Cobra Convertible
MM XL FLSFC & CC Plates, JLT CAI & PCV pre-filter, 3/8" intake spacer, Steeda catted-X, Magnaflow cat-back, SCT/Bama tuned. Yes, I cut my springs.
Future wants: saving for MM coil-overs and need some low R torque (KB?)
I recommend Yosemite be on your bucket list!
Past Stangs: '91 LX 5.0 Convertible, '85 LX 5.0 Convertible