I converted my Challenger from manual drums to manual discs (the magazine conversion using junk yard parts) and NEVER looked back. It seemed like the stopping distance was cut in half.

I have power front discs on the GTX. It seems to me there's less "feel" when I stop and they don't actually relieve much in the way of pedal effort. I also don't like the way the booster takes up so much space in the engine compartment.

If it were me, I'd spend a day in the jy and another browsing through the autoparts stores and convert to manual front discs.