CompCams cam as installed in My 383:

PART # 12-000-8
ENGINE CHEV SML BLK 265-400
   1.050 BASE CIRCLE
GRIND NUMBER CS 288-4/288-4 R110
   SERIAL NO H 2338
                 INTAKE   EXHAUST
VALVE ADJUSTMENT   .020     .020
GROSS VALVE LIFT   .549     .549
DURATION AT
 .020  TAPPET LIFT  288      288
VALVE TIMING    OPEN    CLOSE
AT  .050 INT     12 BTDC  52 ABDC
         EXH     52 BBDC  12 ATDC
THESE SPECS ARE FOR CAM INSTALLED
AT  110  INTAKE CENTER LINE
                 INTAKE   EXHAUST
DURATION AT .050    244      244
LOBE LIFT         .3660    .3660
LOBE SEPARATION     110