Search this site. I've posted enough info and search google for over sea's turbo build threads.
You need low comp pistons, forged rods, may as well lighten the crank and flywheel, hardcore clutch, strong gearbox with LSD, big brakes. A turbo manifold inlet and exhaust, the turbo with oil lines, fall custom ported head with turbo cams, solid lifters, updated valves, standalone ecu with costom map, the all the plumbing with fmic.
Oh and £10,000+