........... Part numbers!! On and automobile part

But with a Duraspark vacuum chamber, if it's a single diaphragm, if it fits, it's the same. The only real difference might be the initial setting - and you can change that with an Allen wrench down the tubing hole.

Now with that said, I have in the past mixed and matched Ford distributor parts and they have always worked just fine regardless with the only difference being the early distributor wiring with a different colored ignition module grommet (but the vac chamber is still the same)