If you are not sure if you have a Bosch or Autolite distributor, measure the diameter at the base of the cap. A Bosch cap measures 2.87" in diameter. The Autolite cap measures a 3.35" in diameter (excluding hold-down tab protrusions).
Note: Bosch no longer makes breaker points for the 1600 distributor. The Pertronix Ignitor Breakerless Conversion Kit for FF1600 Bosch Distributor (Part No. 1335-005) does not require a condenser.