If it were me I would pull the caps, crank, and pistons. Clean the block good just like you would for a rebuild. Clean everything like you are doing a rebuild and lube it. Blow out crank passages and reassemble. Basically do it just like a rebuild without putting in new parts. That gives you the opportunity to plasiguage things and verify the work.
You never know how much junk is in the assembly lube. There's no need to have it dipped as far as I am concerned, just do a meticulous clean and check the clearances on things. Cleaning it good also let's you check for cracks.