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A Performance Distributors D.U.I. (Davis Unified Ignition) system was put in place of the original '74 junk. The D.U.I. is the easiest ignition to work with. With it you get a much bigger, hotter spark and there's just one wire to hook up to a switched-ignition positive lead. The only other wire connection is a single wire to a tachometer. We were also able to try out a Performance Distributors Mr. Amp 130-amp alternator. It's a one-wire hookup as well, and simplifies and improves our electrical system even further.