You can put a Holly Sniper on the engine but I wouldn't use a catalytic converter. You can convert the 216 to propane so no need to worry about the 261.

Personally, the smells of old cars - uncatalyzed exhaust, gasoline, and hot oil - are one of the things I like best about them.

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)