yeah, you've definitely got some issues there....I wouldn't assume the cylinder plating is ok until you measure it, you may find it's beyond it's wear limit.
the factory castings suck around all the bridges, period.
depending how much you're willing to spend, I'd just have it stripped, all the bridges re-welded, and re-plated to the closest size to what it is now....you need a new piston/rings/pin/bearing/circlips anyways, maybe even have the head reshaped?...might as well just do it all now and be done with it.