I got the middle seat out of a 99 4 door Tahoe. It's mocked up in there right now. I have to finish the brackets. The seat will still fold up so I have some storage under it.
http://i74.photobucket.com/albums/i255/poorboy53/63%20C20/seat3.jpg
http://i74.photobucket.com/albums/i255/poorboy53/63%20C20/seat2.jpg
http://i74.photobucket.com/albums/i255/poorboy53/63%20C20/seat1.jpg

unusual seat color.

Looks kinda different in the pics, but it's grey leather.

Are there tracks under the seat to move it back and forward? It looks great.

No tracks. I was thinking of fabbibg some brakets so I could use the stock ones. But decided not to because noone else will be driving the truck.