polarman's refurb Claytronic 68 Dart

. . . . . 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.

SBP disc brake set-up is as close as an OEM Kelsey Hayes 4 piston set-up.