how do i install a chrome box

moparraceman said
should i use a dual resister ? has the stock one now how do you hot wire it ? sorry not good with electrical

I have to agree with others who say the modern ECU doesn't use the 5th wire so a dual resistor isn't required. I too am running a chrome box with single resistor in my 67. That resistor has to be good though. You can check it with a Ohm meter, bypass it temporarily, or just replace it.
To bypass it... Since its harness connectors are female spade terminals, pull them and join them together with a small strip of metal. If it continues to run in run the ballast resistor is bad.