Nope and I wonder if this was an aftermarket cam. I just dragged out for the first time in a blue moon my old O.H.O (Off Highway Operation) Parts Book and the lengthy section on FE's. Three 427 cams are listed:
C3AZ-6250-AA .500 lift, 304 degrees duration
C4AE-6250-B .500. 324 degrees duration
C8AX-6250-D .600 lift, 330 degrees duration
No other references to a L1/P1 cam.