FWIW, most of the Vortec long blocks I buy have VERY little bore wear. They're always 4 bolt main blocks tht I get and as far as I can remember they are all 880 blocks. All they needed was a clean up and a quick hone job.
All were roller cam and I believe most were truck engines (906 heads).
If you can get one at a good deal (most I've paid is 350 for a long block) you can make 400+hp really cheaply. A rebuild kit, intake, carb, dizzy, and cam is about all else you'll need to add.
Most of the TBI stuff I saw was worn more, but it was also ran very hard, so that may have made the biggest difference.