polarman's refurb Claytronic 68 Dart

The car has no trim on the rear of the trunk. I have a buddy that is really good with an airbrush that I want to restore the design on the hood and do something that would match that design on the trunk between the tail lights. I want the car to scream 70's when it's done. I'm not planning on modernizing much at all, but I would like to find a disc brake kit for the front while keeping the small bolt pattern wheels. Am I just screwed there? I can't find a kit that isn't large bolt pattern.

Please leave the awesome wheels and keep the color scheme on the hood 8)