Jimboat, do you what year the boat was manufactured? The reason I ask is because what everyone refers to as the "older" Weldbilts, were made in Perry, FL I believe. At that time they were under completely different ownership, and were built very well, similar to Sandy Whites. Today's Weldbilts are manufactured in Arkansas and as I have discovered, they're not very well built. Pics of the boat would be very helpful.
I don't know anything about the older Weldbilts, but I can tell you anything you want to know about the new ones. It's likely the floor is wooden, but it wouldn't have come from the factory that way. Even an older one. But people tend to customize their aluminum boats to their taste, and I have seen many a wood floor added.
When you go to look at the boat, go over it with a fine tooth comb, looking for cracks and broken welds. The new Weldbilts are made from .080 aluminum which is very light weight, but also very weak. It will work fine for small rivers and lakes, but they don't like being exposed to a chop, lots of boat, traffic, or any sort of rough water. Ask me how I know...