yes pre 1968 ke10's have different dashes and some 1968 ke10's have the 'newer' style dash. don't know when they changed over (month wise), they also have a different front apron that doesn't have indicators.
yeah there are, u have to join a club, and u go out with them, u can use what ever car, i think its about 100 bucks for membership. i ll try and find some more info of a mate