Monterverdi High Speed was initially (1967-68) advertised with single (375 S) och dual carb (400 SS) 440 engines. Claimed performance for 1x4 bbl was 375 hp @ 4600 rpm and 480 ft lbs @ 3200 rpm, for 2x4 bbl 400 hp @ 5000 rpm and 485 ft lbs @ 3300 rpm. The dual carb alternative was discontinued after about a year so sales numbers should be marginal if any at all.
