Chainsaw Repair

Thanks again for all the info, the 066 is Is definitely a challenge with all the variations? I think that’s why I like messing with them.
Over the last year or so I’ve accumulated allot of parts for the 066 and 660 by learning the hard way.
It’s just a labor of love, I guess? I could have bought a new 660 or a good used 066, but what fun is that?
I got my 066 back together Saturday. New P&C, OEM bearings and seals,  Runs Great
think i'm gonna start on another 660 now.
thanks 660 I really Appreciate all the help
I sold some spare parts on eBay last week and i guy bought a used 660 cylinder and some other parts from me, after he bought the parts we got to messaging back and forth and he told me he had an old 064 case he was going to use the cylinder on, i asked him if he knew the cylinder he bought was off a 660, and i didn't think it would work without some grinding or modification. he said, "No there all interchangeable", I  just said "Oh OK good luck"