Heavy oil is just going to cover up some lifter tick if there is any.

Worst thing to do right now is drive it and throw a rod through the block or something shitty. I bet you if we all chipped in we could get you some bearings/used crank or whatever you need to get it going, but without taking the oilpan off and checking out the damage, you/we don't know what to tell you.

Truth is just by looking in the crankcase you won't be able to see much.
If I were you I'd get those pistons out so you can see the crank. Bearings are cheap and you could prolly get away with just replacing the m and using everything as is.