well with a motor with mileage like that i would say do a compression check first before investing that kind of $$ into a turbo setup. i, myself, am planning a turbo on my civic with 144k on it and have to check some things beforehand. first and foremost im changing the timing belt and water pump, coolant flush, and compression. im preparing with every detail i can think of so i dont make a mistake that costs me an engine.
EDIT: oh, and if you have similar mileage on that clutch i would replace that, i have to do that as well. also going to either replace the fly wheel or get it resurfaced. i think it may be glazed.