Well I know the vin#s are correct. I checked the block the trans and dash before I purchased the car. No build sheet but does have fender tag and the rear end is not original to the car BOM 69 but the fender tag does say 3.23??? The 4 speed tunnel appears factory, welds and finish look correct to me and the dash has the yellow reverse light and wiring appears oe and correct. You can usually tell if someone added the 4 speed. The tunnel welding is usually the tell and then the wiring is usually wrong. But they would have had to fake the trans pad and the fender tag?? Its possible but when I purchased the car I did not pay a premium price. If you went to all that trouble I would think it would be for $$$$$ ?? Anyone else have 4 speed gtx with a 22 inch radiator that you know is original??? This is the same conversation we had in the garage today??? Thanks Larry J