I thought a shoebox Chevy was a 62-67 Chevy 2? The "tri-fives" ( I loath that name too) were called this in 55-57 sales brochures buy I never heard an owner call his '56 a "tri-five". Shoebox was also reffered to early 50 Fords. Whatever, this ain't Mopar so I'll drop it.
You're right, I have heard the 62-67 Chevy IIs called that. But being a owner of a couple 55s, and a couple 57s, they are what I think of when I hear "shoebox".
To tell you the truth, I think I would look for the right knurl size, and if I ended up with 1/2x20x 3" studs, I'd just get new lugs to go with, and drill out the drums.
