What condition is the surface of the crankshaft? If it's not deeply scored, you might be able to salvage things. Loosen or remove all the bearing caps so the crankshaft can drop a short distance, slip a piece of emery cloth between the shaft and the block, and "shoeshine" the shaft until it's fairly smooth, then use Prussian Blue to indicate where to scrape the bearing material in the cap and smooth it up. If you run out of shims before getting the score marks smoothed out, it's possible to file the mating flange of the cap to reduce the clearance, and keep on fitting and checking. The only thing you won't be able to do is smooth out the upper bearing, at least without taking the engine completely out of the car and removing the crankshaft. With as much remaining bearing material as the photo shows, that one is very fixable.
Jerry
