You are venturing into the unknown....
You need to be careful on the rebuild to get the piston the right way round - it may be obvious but still something to watch. You will need a piston ring clamp to get the rings into the bore with no damage, plenty of oil and a wooden hammer shaft to tap it in.
The Big End Shells should have been kept with their piston so they go back onto the same Crank Journal unless they are scored and need replaced.
You are attempting a skilled job here so make sure you read the bumph and follow it in detail. I've rebuilt a lot of engines but not one of these, however it may be that new bolts are specified for the Bigends as they could be stretch ones or it could have nylock nuts which should be renewed as a matter of course - all this info needs to be known up front as does the torque for all bolts/nuts and the order of tightening.
Loads of little things to get right.
Good luck although luck shouldn't be a factor really
