inherited 68 cuda, starting issues

Crawled under the dash best I could and found a disconnected battery (+) cable to the back of the ignition switch. She's turning over and wanting to start now at least. Cranking and firing just won't start yet. The sitting for years probably doesn't help that.

Should I do plugs and wires if they haven't been done in 6-8 years? It cranks but doesn't want to fire over.