59 Tbird also was available with a 3 speed manual, no idea how common they are. I saw such a car at a local informal car gathering in late July last year. 352 with a 3 speed manual, with a column shifter. I recall, I believe on the other FE board, one of the guys converted his 1960, I think, Thunderbird, from a 3 speed to a 4 speed Toploader. I have to think there are not many looking for Squarebird clutch linkage, but for those that are, I imagine finding that stuff would feel like winning the lottery.