I just replaced all of my rear wheel studs with Dorman studs (610-186). I have seven originals in good shape (three not so much, and not original). Could be helpful if you need to replace a few to look original. The Dorman's sure don't. These should be correct for Skylark/GS/Century from the mid-60's to the late 1970's when they went metric. $10 and I'll cover shipping.