zetecs are good for what they are but its advisable to change the tank to an rs/xr3 one plus the pump, and then ya gotta wire it all up, and if its ya first project its a bit step, but as fastford has kindly given a step by step guide on the 2.0 zetec into a mk4 so it pretty much tells ya what to do, 1.6cvh its an easier option and there cheep and easier to modify, and cos rst's are 1.6cvh turbo's you can put everything minus the engine and loom and ecu in your car, so if you do decide to turbo it you only need the lump, twin 40's are carbs which were the early mods before crazy turbos