if you're gonna do a turbo kit, then upgrade some of the internals. www.fjdistributors.com have a vitara piston motor refresher type kit for $300 that will replace most of your factory parts with new ones, comes with a metal head gasket and 4 vitara negative dome pistons to handle boost pressure, as well as coming with water pump, new bearings, and all necessary gaskets. then its better if you stick to a good turbo kit, but the ebay kit is fine as long as you get the cast iron manifold, and new 'round' intercooler piping (the last ebay kit i saw claimed the piping was round, but it was shaped like a pentagon).