I have a 66 c10 1/2 ton 2 wheel drive that I just acquired and I plan to restore. I am not familiar with pickups so I dont know where to look for a copy of the build sheet. I do know that they sometimes put them behind the seat but I have looked there and it has either been removed or the stuck it somewhere else when this one went down the line. Can anybody else give me any ideas where it might be Thanks Chris