I've had (2) GEN1s, a 1970 and 1972, and (7) GEN2s (1973-1975) - both are full fiberglass convertibles up to the windshield. I have a love affair with them. I also had a (2) GEN3s (1976 - 1991). Those were the steel half cabs with fiberglass rear tops.
The GEN1s are out of most everyone's price...