It looks like it is all bolt-on, should be much of an issue to return it to stock. Erick561 sells parts, if you get the truck, likely be able to get the stock parts needed through. Even if it there is some more to it, if the interior is as clean as the rest of the truck, and you aren't paying current market value for a a clean 1st gen, I wouldn't let a little work scare you off, the 1st gen values have gone up significantly over the last 4yrs.