how do i install a chrome box

I run the blue wire to the input side of the ballast resistor... To find that one, disconnect both connectors from the ballast resistor and put the key in the run/on position, connect the clamp for the test light to the negative side of the battery and probe each ballast resistor wire... The one that lights up is the input....

The black wire goes to the coil negative (-)....

You will need to get a two prong electronic ignition ballast resistor to replace the old points ballast resistor...