I suggest you disassemble the engine. It's not a race, take your time, examine each piece closely, make yourself aware of wear patterns(usual and unusual), feel free to take notes and pictures. Bag and tag small parts. Take extra note of oil gallery plugs and where they need to go before reassembly. You can let the machine shop do the major cleaning, but you can do the final cleaning before reassembly. Invest in some brushes for cleaning oil galleries and small holes. Get some bottoming taps or thread chasers to help cleaning blind, threaded holes.
If you do not need to rebore, I suggest machine honed cylinders with torque plates in place, to get the cylinders really round and straight for the best ring seal.
