So I was able to buy a pallet of chainsaw wrecks at a clearing sale on the weekend which had 3 880 parts saws in it.
All three cylinders look good so will start to rebuild the saw.
Are there any tricks to replacing crank seals? I or new seals incase that contributed to the seizure, although I'm thinking the cause was running the saw for 6hrs straight without stopping on 50:1 mix