camshaft mechanical roller tappet advertised duration 308/308 lift .575/.575 mopar big block each

CC-23-741-9:
Great All Around Power In 383 & 400 • 750-830 CFM Carb • 3500+ Converter In 383 • 3000+ Iin 440 • Super Torque & Driveability • 4.10-4.56 Gear

CC-23-742-9:
Max Street Effort 383, Requires 4000+ Converter, 750-830 CFM Carb, 4.30-4.88 Gear • 440 Needs 3500+ Converter, 800-850 CFM Carb, Headers, 4.10-4.56 Gear