Are you replacing the whole harness or just the covering ? Either way the DEI easy loom woven wire loom is real nice to work with. For my harness I used 3/8, 1/2, and 1 inch. One roll each is more than enough to do a factory harness. Stays flexible unlike the plastic stuff that gets stiff.
Well I checked my eBay wire loom. No tags showing any numbers. But I found a YouTube video by Dan at neomustangs showing the different Fox body engine wire looms. I should be able to figure it out from that. Thanks everyone.