It's not a gs sadly, i just took it out of my benched engine closet because i wanted to know for sure
i discovered it says "Team Orion" on the side of the block which is also marked on top of the grey/silver head.
but i cannot for the life of me find the engine size number anywhere on the block...
i have found the magic squeezing ring in my country.
Good info on re-pinching and doing it in baby steps!
i have an old gs? .15 engine i can test this on and get a feel for it.
its a parts engine anyways and the sleeve is shot no matter what, piston falls right through🤣