No power to coil, engine turns over.

That is a Mopar electronic distributor. It should work fine w/ the orange ECU if everything is wired correctly. 360 vs 318 engine doesn't matter, both are small blocks. Similar to the VR, the ECU case must be well grounded to work and those rusty sheet-metal screws may not be doing it. Run a dedicated jumper to a good BATT- ground. Also, insure your engine block is well grounded, or no spark (even w/ points).

If too much fuss, might be easier and better to switch to a GM 8-pin HEI module and coil. It will work with your Mopar distributor fine and greatly simplifies the wiring (no ballast), plus stronger spark. Many posts. Cheap setup at the junkyard (85-95 GM V-8 trucks) or buy TrailBeast kit. Even easier is the $45 ready-to-run distributor (Ningboa) on ebay. Bolt and go. Many here use it.