You can get exhaust manifold gaskets although they did not have them stock, ford and others have them. If the uppipes are not too far gone, then have a muffler shop expand them until they fit tight into a new uppipe gasket. If they are gone, then replace the uppipes. Slather the uppipe gasket with antiseize for better sealing results. You may have to replace the uppipe bolts since they tend to rust in place.
You have to pull the turbo to do this job. Front bolts easy, rear bolts, use a 10mm 1/4" swivel socket/3/8" adaptor/extension to get at the rear bolts and grunt hard. The bolts at the back of the turbo flange, top ones easy, bottom bolts hard, cut a box end wrench in half and tap with a 4 oz. hammer and they come loose. Sounds ridiculous, but my buddy showed me this on my truck after much struggling on my part, it took him only a couple of minutes for each bolt. Also have to unbolt the downpipe. You can get to the uppipe bolts from below the truck with a long 3/8" extension.
To reinstall the back turbo bolts, tape the bolts with electrical tape and leave a long "tail" to remove the tape later, put the bolts into the turbo mount holes so the bolts do not stick below the turbo mount and then mount the turbo. The tape keeps the bolts from disturbing the turbo orings. Start the bolts with the same socket/extension combo and pull off tape. Then put in front mount bolts. Align the uppipes, the exhaust inlet adaptor and turbo, then tighten up. This part is harder than it sounds but be patient. May take several tries to align the turbo, uppipes and exhaust adaptor.
