Mine was so jerry rigged, I just bought the Harbor freight wire rack for $40 and started from scratch. Good soldering iron and shrink tubing and a fre Packard 56 male/female's and about 3 hours of work. Make everything about a foot longer than you need, moving from the bulkhead connector forward. Wrap/split loom/whatever as you go toward the ends, cut to fit and then terminate. This way you can reroute stuff like MSD ignition and electric fans, etc. leads. Make a note in your manual if any of the colors changed (they will) and you should be good to go. Of course, if you have a model that is available, a wireing harness from a donor will put you ahead, but some cars are a little harder to find parts for. split loom is great as it allows you to sneak in there and test without unwrapping the vinyl wrap, and even replace a run without pulling the entire bundle apart.