i used some shop off el camino real (can't remember which) when i had a flat and wanted a plug mounted on a saturday. After this i got a nasty vibration in the car. Took it to custom alignment they found that the tire was mounted against the rotational direction and the balancing was done incorrectly. CA redid the job and the car runs smoothly up to 160+mph! I am such a convert for the job of CA (even though it is a bit more) that if my viper needs their services and they are unavailable -i wait!
Custom Alignment is your best option if you can get over there during the week. If you are in a pinch for a Saturday appointment, I've heard really good things about the America's Tire on Brokaw Road across from Fry's Electronics. I've taken both of my Camaros there, but not the Viper so I'd recommend calling regarding the 335 tire.