MP Electronig Ignition Converion '66 Dart

Hey All,

I'm putting electronig ignition in my '66 w/ the stock 273. Anyone know a good spot to mount the new balast resistor? The new resistor doesn't match the shape of my exisitng resistor so I can't re-use the factory bracket. Can I get a longer bolt and put it on the firewall w/ out a bracket? Can the resistor be mounted right to the firewall like that?

Thank you.