Ballast resistor location

[Denis]

My '68 W-300 has the stock 318 engine but the previous owner changed the ignition to Crane Cams Multi-Spark unit with a Mopar breakerless distributor. He also removed the ballast resistor.
Yesterday my truck failed to start; no spark at plugs. I traced the problem to the Crane unit or the coil. Have several Mopar ECU's and was going to go to the stock Mopar system.
My question is any body have a picture or know where the ballast resistor was originally mounted and also where was the ECU box mounted on later year trucks that used them??

Thanks

[712edf]

Ballast on 66 (yours should be similar) was mounted on master cyllinder to firewall stud if I recall. On trucks (70's) ECU was mounted on drivers side fender, must make good ground contact with fender to function. Do you have the wiring schematic?

Bucky

[Denis]

Schematic

Bucky;

Thanks for the info. I don't have a good schematic. I copied several out of a book at the library but am having a trouble figuring where all the wires go. I have a spare 4 connection ballast resistor and a 2 conection ballast resistor; not sure what the difference is. I can get the harness with the connector to the ECU from Summit Racing.