I ran into a similar situation not too long ago and Jerry helped me sort things out.
I had found a 261 block without the head half buried in the desert. Once I blew all the sand out of the cylinders, I could see that they were pitted. The block had been bored .060. The pistons were shot.
I confirmed, as you have, that Egge carries pistons and rings in .080 and .100 sizes for the 261. My machinist bored out the cylinder with the worst pitting to .080 and didn't get past the pits, so he bored it to .100. There were two pits that were still questionable, so I had the engine sleeved.
Different than you, my pistons were shot and needed to be replaced.
When I had the block sleeved, I had it bored out to standard size. That way, someone in the future could get more rebuilds out of the block.
Some of it comes down to economics. The .080 and .100 pistons from Egge run about $250 per set. The rings are a bit expensive, too. A set of standard size Federal Mogul pistons can be purchased for about $125 per set if you look around and the rings are less expensive. Same think with .020, .040 and .060 sizes. It's the .080 and .100 sizes available through Egge that get more expensive.
It would have cost me $80 to get the block bored. It cost me $520 to get all six cylinders sleeved. So I paid about $645 plus the cost of the rings for the sleeved block with the new pistons compared to what would have been $330 for boring and the pistons if the .080 or .100 boring would have worked.
I'm glad that I got the block sleeved. The question you will need to answer, as Jerry points out, is whether to get the newly sleeved engine bored .060 so that you can reuse your pistons or if you want it bored to a smaller size. It's about a $125 question because you will need new rings regardless. Want more displacement with fewer future rebuilds on the block by using the .060 pistons that you have or do you want more chances to rebuild, are OK with the stock displacement and are willing to pay $125 for new pistons?
Hope this helps,
Matt
