Main bearing question

I seem to have an oil pressure problem after getting the engine to operating temperature. I've done a little reading and things point to worn bearings... main, rod and cam. I thought I'd pull my pan and take a look. I have no idea how the engine was taken care of before I got it, but the pan had a 1/2 inch of sludge in it, even after I cleaned it a few months ago...so that concerns me. The main bearing is pretty worn for sure. Does anyone see that this crank will need turned at all or can I save it?DSCF3255.JPG DSCF3248.JPGDSCF3243.JPG