Those 330 Homelites are getting a bit old by now and most do have a bad boot. All the fuel and impulse lines, oil lines should be changed at the same time along with checking the av mounts. Once done the saw has a reasonable amount of power when fitted with a 16 or 18 inch bar.
I think they stopped doing the chromed bore on the Poulan Pro 42cc when they went to the strato engines - at least they stopped advertising them as "Druachrome". Look at the IPL's for the Jonsered, Craftsman and Poulan Pro - if they are the same piston and cylinder part numbers then probably they are not chromed. That would not bother me much. I prefer the chromed bore but I have found the others to work fine.
Tuning the strato carb is no different than tuning the conventional carb. PP260's are tough little saws - what ailments did you mean? The only one I can think of is that some of the later ones had cat mufflers, but these are easily replaced by the common 2-piece mufflers from older engines (Wild Things, etc.), which are also easy to modify.
Some of the manufacturers put catalytic converter material in the mufflers to react with the unburned fuel that goes out the open exhaust port. Poulan did this on some saws prior to the introduction of strato engines, after which they did not need it any more.
I'm afraid I have not modified any of the last type, although I believe some others here have. The feedback carbs are part of the AutoTune/Mtronic systems put on higher end saws - I've been hoping they put a simple system on cheaper saws, but not so far. The electronics are part of the ignition module, and I think retrofit would be rally difficult, though perhaps not impossible.
