I have Grundy on my Nova, had no problems with them i can drive it any day, anytime, all the miles i want just not to work. I DON'T want to drive my classics to work anyways whats the fun in that? Pleasure driving is for them i drove my 86 Monte SS daily for a while until one day at lunch a 16 year old dropped his cell phone and rear ended me didn't hurt the car that bad tore his truck up though.