A ring job without a valve job will often be a problem because worn valves won't handle the increased compression.
You should drop the pan and look at your rod bearings. Remove one of the rods (don't lose any shims) and have a look at the condition of the babbit. If you're familiar with insert bearing engines, you'll notice that there are no shells to remove once you take the cap off.
If the babbit looks bad, there are a number of places that can redo it. Just look in Hemmings. Or you can switch to rods that take insert bearings from a 235. There are many 216's around that have this conversion (I have one).
But I've heard that babbit bearings really aren't that bad. Supposedly they have better "embedability" than inserts, so they hold up better in engines that don't have oil filters. The dirt particles bury themselves in the soft material and don't damage the crank journals. At least that's what I've heard. Good luck.