I'm 53 and have done the big-ass cars and the Harley's too (after meeting my obligations as husband and father). No broken bones though.
Fun and pride have no age limit and you should follow your heart.
I'm not a racer. I want the Camaro because it is sexy as hell and will be fun to drive. This is not a mid-life crisis thing. I did that years ago.
EDIT: damn, the wheelchair is awesome. My boys have promised me a totally tricked out walker.