[pjmoreland]

Here's a measurement of an American Cushion 67/68 foam and a USA1 cover on a 67/68 frame. It's about 9-1/2" tall at the tallest point. The cover does have a foam pad sewn to the inside of it. I don't remember how thick it is, but it's probably in the range of 1/2" to 1". I discarded the original foam because mice had been living in the seat, and I didn't think to take measurements of it. If anyone reading this has an original full-foam-bottomed 67-68 seat, it would be great if you could take the same measurement for comparison.