/6 electronic distributors
As MeMike, I got a new electronic distributor off ebay $40, but w/o internal plate & pickup. I got the pickup from rockauto.com for $6, but had to borrow the internal baseplate from my points distributor (fits). I see rock has a complete rebuilt 74 distributor for $39. You might check there if same PN until the last slant six's, but any should fit. Be careful on the double bullet connector, since there are some pickups in the supply chain w/ short male pins. A regular appliance style connector also doesn't quite fit and will give erratic operation.
I wouldn't fool with the 70's Chrysler ignition box. The GM HEI is more powerful, more reliable, less expensive, and easier to wire. I used the 8-pin HEI w/ GM coil as TrailBeast shows, but junkyard parts cheap, plus knock sensor and module (later control upgrades). Any 85-95 GM V-8 pickup or 85-93 V-8 car (TBI engine). Even easier would be the "ready-to-run" HEI distributor (ebay), but they currently make for all Mopar engines but a slant.