Hey Matt read thru the info in this link
http://www.how-to-build-hotrods.com/hot-rod-wiring.html (copy and paste if needed)
There is some advice how how and where to use fuseable links.
I agree with the advice on buying a new harness, Speedway carries some low cost solutions. These are made with the correct type of wire and labeled well enough to help you out.
Chuck