You will need a
lot of parts -
engine, complete with TB's and injector rail, airbox, headers, exhaust, complete wiring harness, ECM, instruments - and maybe some other misc bits but that 'big' stuff should give some idea of the scope required.
You're also looking at same list of parts for an 02+ motor.
Even if you get a 99-01 955 engine, your headers will not fit - you would probably require a tuneboy also as the tune will be different for teh bigger engine and there is no suitable tune for a Sagem MC2000 ECM that will just 'plug in'
Here's a low miles Sprint engine - see the note regarding the tune. Otherwise you need 99-01 wiring harness and MC1000 ECM.