Under the circumstances I would like to offer a course of action if I may.
1. Mark where the distributor vac canister is in relation to the engine block.
2. Also note where the rotor points. (right headlight, wiper motor, radiator hose, whatever)
3. Pull the old distributor out.
(Do NOT turn the engine over with the distributor out)
4. Mount the ECU (the part mounted to the aluminum) to a grounded
surface. (firewall, inner fender)
5. Connect the two bare ended wires that are twisted together to your new distributor. (before you put the distributor in)
6. Connect the single red wire from the coil to your existing + wire that currently goes to your old coil.
7. Put the coil wire that would go to the distributor cap next to a grounded surface, turn your ignition switch on and spin the distributor by hand. (You should have a nice hot spark)
8. set your new distributor in the engine with the vac canister lined up about where the other canister did, and the rotor pointing at the same place it did before.
9. put your distributor cap on and put the new coil wire in the center hole.
The engine should fire up.
NOW you can start disconnecting the old ignition stuff and cleaning up any of the old wires.
Doing it this way will allow you to be running off the new system before you take the ols stuff apart.