Will this distributor fit my slant 6?

Can you confirm what the numbers are on the little tag showing in the second photo? That will help ID the distributor.

I can read 387 X 8
The fourth digit (X) is hidden by the screw, but seems to be 6, 8 or 9.

Your car came from the factory with a points distributor. The pictures are from an electronic distributor. Probably a 1973 or 1974. It can be used if you change the wiring and add an electronic control unit. The mechanical advance varied a lot in those years.

I suppose that you speak about the electronic control unit that is located on the firewall?
Like this one :
Mopar Replacement Or Conversion Black 5-Pin Ignition Module Dodge Chrysler Plym | eBay