Check out the awesome rear leaf springs; they pack 11 individual leaves. The vehicle data plate affixed to the dashboard by Superior Coach lists maximum gross vehicle weight at 7,126 pounds. Though the engine and transmission are missing, like all '51 Cadillacs, this police rig was originally powered by a 331-cube OHV V-8 making 160 hp. Two-barrel carburetion was the only choice, as Caddy didn't adopt four-barrel carburetion until 1954. The dual-quad Eldorado mill (a favorite with hot rodders) wouldn't appear until 1955.