You cannot "just replace the rod bearings" on these motors w/o doing some machine work to be sure everything is straight otherwise the "rebuilt" bottom end will come apart shortly. And if a bearing spun the crank has to come out to be checked for damage to the journals which involves taking all the rod caps off anyway. The rod bolts are TTY and not reuseable so you have to buy new ones. So with the cost of replacement rod and main bearings, rod bolts, machine work to align bore the block, machine shop labor to reassemble everything vs. just getting a used short or longblock its really not worth the effort/money, unless you are really dead set on having the matching engine that came w/ the car.
