Thanks Sledger, everything you said above makes a LOT of sense. Thanks for the heads up on the orange box. Now I'll just save my money for the electronic conversion.
You could be like me and make things really difficult by trying to fit in the big cap HEI conversion. I am having to slot my motor mounts and slot my transmission mount to move the engine forward 1/2" so the big HEI cap clears the firewall. The thing that sold me on it is it is self contained and you only have to connect a switched 12v source (single wire) to it. I will also have a tach plugged into it so technically 2 wires. When you see all the wiring for the ECU box, coil, distributor, and ballast resistor you will understand.
I also installed a 100 AMP, one wire alternator and a secondary fuse block that powers all my accessories. I didn't want to overload a 46 year old wiring harness.