fwiw, i got an na block for 50 bucks from the junkyard a month ago, and i transplanted the crank, oil pump, rods, and used bearings (yep, the original toyota ones) into my car and i have been driving again for 3 weeks now! no rod knock!
hint: i got lucky. i would look for obvious signs of why the car is in the jy. if the entire rear of the car is smashed to shit, the motor is probably fine. if the body is in good condition, they the motor is prolly fuxx0red. on the car that i pulled my mine from, it had rusty water marks all over the engine bay (overheating) but it was in places that there were hoses, so i assumed that it didnt have bhg. upon complete inspection (micrometer, plastigage) all journals on the crank were within factory specs still.
whatever you do, good luck!