I
bought a set off eBay because at $35 they are half the price of
similar Fender-logo tuners. The bushings are too large for a '75 neck. The seller responded, "I would check the peg head holes for any glue residue etc. they are supposed to be a tight fit and may require a clamp to press in. Been around vintage basses a long time and have sold lots of these and this is not a normal issue."
I didn't want to widen the peg holes in a vintage neck, and pressing the bushings in with a clamp could crack the headstock. Luckily I had a spare set of Fender bushings, and they fit perfectly. Just FYI, if you intend to buy a Wilkinson set.