I may be wrong on this, but as far as I know, they don't make any +.010 pistons for these. I think that +.020 is the next size over standard. How deep are the pits? Maybe a good hone job would take care of them. Maybe you should take the engine to a trusted machine shop and get a second opinion. Of course an entire rebuild (including new pistons) would be "best", but if you're on a limited budget, then I'd go with the second opinion. Either way, you'd be completely tearing apart the engine and the biggest differences would be the reduced cost of not having to buy new pistons and only having the cylinders honed. Whether or not you tear the engine apart, one thing that you should do is to inspect your lifters. The earlier ones used a bushing for the roller to ride on while the later ones all used roller bearings. The bushings are known to fail after years of use and then they take out a lobe on the cam. If they aren't the roller bearing type, DEFINITELY replace them. I think that you can only buy the roller bearing type these days, but I've been known to be wrong on things like this before too. If you buy a big name brand of lifters, such as Sealed Power, etc., you'll be fine. Rock Auto usually offers brands such as "Engine Tech" as well as the bigger name brands. Even though they're cheaper, the quality just isn't there.