It doesn't appear you have anything special. If its a 4 bolt main you can go through the expense of having it machined and getting new pistons and reusing your crank and rods. If its not a 4 bolt main I would just junk it and get a low mile Vortec engine. I know that expression has been beat to death but its really the cheapest option to get some decent power. Many of them have little to no sign of bore wear and need nothing more than some head work, flat top pistons (hc345np work well enough and are cheap), and a cam (these block have hyd roller provisions). Plus you can get a 4 bolt main one fairly easily.
I would reuse the rods you have now though as many people are having problems with the PM rods.