Just rebuilt my first motor, left bottom end/block alone. My son and a friend both talked me out of doing the bottom end - and a leak down test showed only air coming out exhaust and intake (valves), nothing coming out of oil dipstick, etc - so rings/cylinders seemed fine. Head job, new cam, lifters, pushrods, oil pump, timing chain set, FMS/RMS, exhaust man., water pump, thermostat, freeze plugs, gaskets, etc.
I filled it w/fresh oil yesterday, excited for the milestone. Found a 11" piece of 3/8" threaded rod, ground it down to replicate the bottom of the distributor, chucked