Need help identifying SBM cast iron head

The 234 industrial castings have water crossover instead of exhaust, it’s possible that there are some other casting numbers for water crossover heads, though. The 360 industrial heads I’ve seen were 857 casting with exhaust instead of water crossover and 273/318 size ports with 18mm spark plugs. In hindsight, I wish we had bore scope them to see if they were open or closed chamber.