Been a busy week...too many posts have gone by to try and answer them all...but I'll touch on a couple I remember...
Gumneck _ I have some NOS fuel lines for those top tank saws, both the tank to carb and the one in the tank. Contact me it you are interested.
Xp - I have most of the brake parts for the 10 Series models, let me know specifically what you might be looking for.
If the LRB pistons have bearings (the 600 Series I recently acquired did come with bearings) make sure they are brand name, (INA, Koyo, Torrington, ect.) and you'll be O.K. When you press them in you should have a mandrel that fits the I.D. very precisely, otherwise you risk crushing the cup slightly causing the bearing to twist and no longer run true. Here's one I made for the PTO side bearing into the insert on the 70 cc ++ saws. The bearing is in the insert, the O.D. of the mandrel fits the I.D. of the bearing very precisely to hold its shape as the bearing is pressed in. Also keep in mind that the needles are loose in those bearings and will fall out if you are not extremely careful when handling them. Washing the bearings with solvent will almost certainly clean out any oil that is sticking the needles in place and they will come out. It is possible to put them back in place using a little grease to hold them, but it is a tedious job.
Regarding the 3200, 3214, FR2.0 etc. saws. These are the last of the McCulloch saws engineered and built when McCulloch was employee owned in Arizona and assembled in Mexico. They are not bad little saws but remember that they are only 32, 35, or 38 cc depending on the model. The oil tank can be problematic, if the cap is leaking most folks overtighten it rather than replacing the gasket and putt the threads out of the cap. Most of the time they will need to have the fuel lines and oil lines replaced but they are not bad to work on and will cut a bit of wood when you're done. I think they are more comfortable than a Mini Mac to operate with the handle layout but of course they don't work like a top handle saw. I can sell a good running, clean saw that has had the fuel & oil lines replaced for $100 with a clear conscience. I would not buy one that needed work for that much. If you need to cut stuff over 8-10" in diameter all day long look for a bigger saw.
Mark