If you notice on the pictures, I try to reinsert the bolts from where they came from. I did this on my atx rebuild and it worked fine. When I get ready to take the block to the machine shop (they are rather common around here) I'll have to make note of where they go.
I've rebuilt a few motors years ago so this is not totally new. Sensitive process comes on reassembly the bottom half....using silcone sealant, can't wait more than 20 minutes and replacing torque to yield bolts, checking endlplay, checking rod side clearance, etc. As I remove and clean parts, I place them under the car which keeps the garage in order. Had a few people come over and ask where are all the parts!!!
I'm glad I pulled the engine apart. With broken chain guide and tensioner almost out my engine would have fell apart soon!!!! costing me more money if it did so....
