I'm sure your going to find at least 1 crank bearing shot due to debris as they are open bearings so a complete kit is your answer. Be sure to check your ring end gap in the cylinder before installing the piston/make sure the port is facing the intake when installing the piston/use blue Loctite when installing the seals be careful not to over drive them/use anaerobic sealer on the case halves/make sure to alien the pulser plate in the correct position as removed (I'm sure you marked it before you removed it) then you will be good to go. If I've missed anything someone will chime in.
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LOU