Looking At Buying R34 Gtt

[Ruxis]

Hey guys,

im going to look at a s2 gtt 2000 model tomorrow and was wondering if this is this right kit for the 100km service.

http://www.kudosmotorsports.com/catalog/nissan-100000km-service-kit-water-pump-timing-belt-nissan-skyline-r34-25gtt-rb25det-neo-p-91.html

do i need anything extra? like an oil pump or harmonic balancer?

also what would be involved to change those parts over? do i need to remove any major compents like engine or radiator?

also how much would a mechanic cost to fit everything for me just incase?? (roughly)