Ignition Upgrade Time....

http://mymopar.com/72to76_wiring.htm.

This may help!! Take a look at yours and the 74 wiring.

There is someone here that can make this a bit easier for you.
I Think it is jus a simple change, Just a couple wires and dual resiter

Some times its best for me not to try and help with this ,so wait and a good tec will get with you.