Yes, the 1974 engine I have has a 2-groove outer crank pulley (cast). I am guessing for p.s. and aftermarket AC. Never saw the car and AC brackets are missing. Didn't have an inner crank pulley. I expect all after-market AC would do such since it would be too much to require a dealer or shop to remove the damper to install AC (must remove radiator, ... adds risk).