Someone put the wrong distributor in this 273...but it works!

Hi guys. I've purchased three rotors from a couple of sources for my 1964 - 273 engine but they are wrong. So I thought I would pull the numbers from the distributor and it looks like it might be a 318 distributor.
It's a Prestolite distrib with the numbers:
2444763 and below that is IBP 4003 AA 4W
I've found a rotor that looks correct for an IBP distrib but I don't want to order any more rotors until I find out exactly what they've dropped in here.
I'm sure somebody here has some old Mopar microfiche pics floating around in their grey matter, ha ha
:lol:Looking forward to hearing from you.
Thanks, Wally
I just looked in my Filko Ignition book and they listed a single point Prestolite in 1959 All with "IBP" distributor. It was a Chrysler listing. There are a few Dodge listings as well.