I replaced the floor pans in my 1953 6400 series with pans from Chevs of the 40's. The quality was good, everything fit fine except for the gap in the toe boards. For some reason this must be a common problem. I thought possibly the problem with mine was that I was working on a big bolt, but that doesn't seem to be it. I ordered a lot of sheet metal from Chevs of the 40 and found everything to be of good quality. Everything always seemed to fit in place without a lot of problems. For some items they have a standard piece and one they call "superior". I always ordered the superior, and was always pleased. I'm sure other suppliers have good products. I just got started with them, found everything satisfactory and stayed with them. Allen