You can probably just use a set of Ford manifold gaskets, but if you buy a new set of long tubes they should come with gaskets I would think. At least you don't have the problem Automatic guys have with long tubes, they don't make many brands that will fit on automatic cars, and I think they are a lot more expensive. I think I will just stay with my stock cast iron manifolds, if I was going to do headers at all I would go with SS FMS shorties. A lot of trouble to install long tubes or any headers, and as I said long tubes for autos are scare, and high.