It depends on who you use. I think MAD (Mark shead) said that a basic rebuild costs around £3.5k. dont forget that a bad rebuild is complete scrap and then you start again. the uprated clutch is not really the realm of the engine builder, anyone putting in or taking out the engine can do that. the engine in and out can easily take a half day each or more so best if you can do the basics...I am not sure if the 3.5k above includes engine out or not. a good builder will give some guarantees if they do it all. I think drive in and drive out would be at least £3k these days and then if you add extras the costs will spiral. Head work is bound to be £1500 then crank same again, nice pistons etc....the list goes on but you may not need so much?