I personally own a 1973 Superbug and prefer it (over the '74 and later) simply because of the smaller bumpers; however, anything can be changed (within reason and with some effort) on these cars so essentially you can buy any year and make it what you want it to be. The cars earlier than '74 will benefit from the late front suspension being retrofitted to them. The '75 and later rack and pinion, although nice, isn't such a great benefit to warrant all the work necessary (in my opinion); in fact, I've read that the German Kafer Cup racers said that the early steering box turned quicker than the rack.