Lead ... not mine. I thought several people were looking for one of these .... unk if a 2-speed or 3-speed. https://www.ebay.com/itm/1965-Buick...830000?hash=item548de4b970:g:Ml0AAOSwlIxfmbBS
65-66 were 2 speed only. 67 GS had a different 3 speed shifter. The seller has a bunch of other 65 GS parts listed too.