AMPHICAR OWNER GREGG SYDENSTRICKER ENJOYS A LITTLE SPLASH in his life. So, if he asks you to go for a ride in his vehicle, you may want to change into your bathing suit, toss in a life preserver, and pack the Dramamine, since his brightblue 1967 Amphicar is designed to not only dodge potholes on roadways but also small whitecaps on water excursions.