I bought a new one from a Year One or Classic. Bought so much stuff, forgot which. It was an M&H harness and was high quality. Bad news is that it was about $500 even on sale. If I ever do another car I am going to buy all the harnesses first and change them all out at once. Would have saved myself a whole lot of aggravation and several buckets worth of swear words.
The inside A/C harness was separate on my 69 probably the same on yours. If you don’t replace the under hood harnesses, make sure you clean the contacts really well and use dielectric grease or you will be doing it over.
