If you didn't feel a rhythmic drag or pulsing on the steering wheel when going straight, one possibility for the non-centered steering wheel could be front end alignment. I had the non-centered wheel on a car of mine, and a front end alignment cured it.
Another could be the dreaded bad tie rod end.
Bettie's mods include:
Reverse sensors - Sequential turn signals - Blue Wheelskins steering wheel cover
Blue door panel inserts with chrome trim - Stainless vent trim rings
Old school machine-turned applique on console, steering wheel, A/C controls and door switch panels
Extra air provided by MagnaCharger via Cervini Shaker Hood
BBK shorty headers and Corsa extreme
Blue AAC halos and blue LEDs in hood scoops
Bettie Page hangin' from the mirror!!