Need some advice:

I was in the middle of changing to disk brakes on my 68 Newport when I broke a brake line. I haven't worked on it in awhile now. It won't run now that it has been sitting so long. I think I have bad gas in the lines, or it just turned to sludge. Should I get the disk converted over or should I get the fuel system straightened out and get it running again. I agree that I have been very lazy. I look forward to all comments.