I reacon the best thing for you to do is to take the block in to your local engine builder and get them to rebore, regrind crank and get them to refit the crank with new bearings etc, check the face of the block is straight.

Really thats the only bit you can't do.

Make sure he tells you what size it needs boring to and make sure you can get pistons that size.

Take new pistons and rods to them and get them to fit the pistons to the rods (if the pins don't slide in (they will be tight to either the piston or rod but not sure which)

You can then re-fit every thing else ~ oil pump, water pump, oil pick up, sump, flywheel, seals, etc.

Get the head checked for straightness then refit it with all the new valves, cam etc.

TIP ~ don't fit the followers and rockers until the cam belt is set up and fitted correctly or you could easily bend valves.