Mopars 1968 '383 Engines'
And another version of the 1968 Sales Brochure, with different Camshaft Specifications.
340/275 HP = .445"/.455" Lift ~ 284*/292* Duration ~ 60* Overlap {4-Speed Camshaft]
383/300 HP = .425"/.437" Lift ~ 264*/268* Duration ~ 40* Overlap