We were cleaning up the shop and ran across a few manuals in good shape for their age, one is a 65 Buick shop manual chassis 45000, 46000, 48000 &49000 models. 70-74 Motor vacuum & wiring diagrams 10th edition also 76-77 vacuum & wiring diagrams.
They belong to the shop, I looked them up today and found them on eBay. The vacuum & wiring diagram was $19+$3 for shipping. It’s one manual with both vacuum & wiring diagrams. Sorry Jaye