225 Slant no spark

Go to MyMopar.com and you will find many trouble shooting guides that will help you further.

Start with this one since your wondering about your ballast resistor.

http://www.mymopar.com/index.php?pid=115

Then move on if that doesn't solve your problem. If you keep digging you will eventually find your issue. Check all your grounds including component to body grounds as well since there has to be a path for the current to flow.

Here are the wiring diagrams for your use.

http://www.mymopar.com/downloads/1964/64ValiantA.jpg

http://www.mymopar.com/downloads/1964/64ValiantB.jpg

Take your time and stay calm and focused. Electrical problems can be a bear if you have never worked on them. The trick is to stay on one thing at a time so you don't get confused or miss something simple.

Do some more testing then if your still stuck take a break and start over. I wish I could help more but without having my hands on it I can only do so much.

If you haven't done all the steps in post number 3 then go back and do the steps from beginning to end.