All I've ever owned are cars built before 1972 and trucks built before 1980. I've never used lead additives and have never had hardened seats installed on any engine when a valve job was required.

Unless you're auto-crossing your truck, you will never experience premature exhaust valve wear with standard valve seats.

The Bismarck has 200,000 miles on it running unleaded fuel only for more than 2/3rds of its life with absolutely no problems. I just filled it up today with unleaded. 15.6 mpg.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)