Not sure about those little Buicks, but in my E-body I could pull the needle off of the speedometer. What you need is one of these, from a Swiss/Belgium built car: I sold a few of those to board members in Canada, and also in the US. Only have a KPH unit for a 1971-1974 full size Buick in stock now.
This German company sells KPH stickers for Chevelles, no need to remove the needle: Click photo to visit website
Thanks, I visited their website before and they do not list the 1970 Buick. I did not think about other A-bodies, like you suggested. They also have a sticker for an Oldsmobile which seems to be a good fit: I will give it a shot and contact them. Thanks for your hint.
Let us know if you find something there, always handy to know The next time I come across a Swiss/Belgian speedometer for an early 70's A-body Buick, I will contact you.
Thanks, today I dared and I was able to remove the needle. Just wondering what it would mean when Redmanf1 would state "pull firm" I had to pull quite a bit and actually used my miniature Stanley wonder bar. Different subject: does anybody know what kind of special paint is used inside the pot?