I had the same problem as others on the board with the car wandering from side-to-side especially at higher speeds. I thought I needed a front-end rebuild or steering box, but my mechanic said it was all fine. Sure enough, I got new front TIRES today and it is completely gone. Maybe this is obvious, but don't underestimate the small stuff. BTW- my old tires looked like drag slicks.

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89' Firebird Formula
Black/grey cloth
305 TPI/5 speed/3.45 rear
dual cats/PW,PL/T-tops
K&N, SLP TB booster,
SLP exhaust, Jet chip

 

Well, my problem got worse when I upgraded from the 14 inch wheels to the 16x8 IROCs (my fronts have 225/50/16's and the rear 245/50/16's). The wandering is caused by wide tires. (Can you imagine how bad the Viper tracks?)

What kind of tires and size did you change to?

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85 2.8L Sport Coupe 5-speed.
Mods: Hpertech chip and powerstat, MSD 6A-L, Crane fireball coil, Accel Cap and Rotor, Dynomax hi-flow cat and catback system with a dynomax magnum race bullet muffler on the i-pipe, K&N filterchargers, Gutted Air Boxes, 8mm Wires, Eibach Sportlines and Tokiko springs/shocks setup, Global west sub frames, Suspension techniqs front and rear sway bars, and good ole 88 IROC wheels with Kumo Ecstas on em!
"It's not the ricers, it's those damn V8's!"

Wins: 2000 V6 Accord, 69 302 Mustang, 2000 Auto VR6 Jetta, 89 Toyota MR2, 90 Civic Si, 76 350 Camaro, 2000 3.8 5-speed Camaro, ~68 Chevelle 350, 92 CRX Si.

 

I have the stock Formula wheels-16"x8" and put OEM 245/50ZR16's on them (BFG G-force KDWS). There is of course more wandering on a wider tire then on, say, my Ford Taurus. But the problem before I got the tires on was like a violent move side-to side that was a constant series of corrections. I mean I musta looked like a drunk driver. My brother's 87' TA had the same problem, and his was the center link. I guess I was luckier.

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89' Firebird Formula
Black/grey cloth
305 TPI/5 speed/3.45 rear
dual cats/PW,PL/T-tops
K&N, SLP TB booster,
SLP exhaust, Jet chip

 

I know exactly how you feel man. Sometime you almost hit the guy in the next lane!

 

My 87 formula with 245/50r16s. does this too. But only in town at slow speeds and on worn roads. Out on the highway I cant feel it at all. Seems the faster you go the more stable it feels. Replaced struts, checked out the whole front end, and had it aligned. Struts seemed to help but after a couple of weeks went back to the same.

Heard this might be inherant on vehicles with the handling package. Something about different alignment specs.