No matter the year on your car, these are not a direct bolt in. You'll have one of two possible issues. The chain pitch changed to smaller pitch circa 2001 and you cannot mix/match the two styles so if you've got a 2001 or newer car, you'll have to buy the contour timing assemblies including arms, tensioners, chains, and crank sprocket. If you've got a pre-2001 taurus it's very possible you've got the waterpump that is driven off of the front end accessory drive and not off the cam like the later model cars. This means you'll have to lop off the cam drive on the SVT cams.
If anyone is doing a 98-00 swap and is interested in a set of ported and polished heads with SVT cams all ready done up for them, I might be selling my set. I need to get the cylinders dressed back up after I've pulled them, but that's about it.
Rick