Check exhaust port size versus adapter. You might have to enlarge these in the adapter. Besides you have to check the cooling. A stock 200 leg has a sandwich plate with a popet cavity that works with tstats and popet in block. 3 options: 1 modify your adapter plate to make it work as the sandwich plate/ 2 remove popet and stats and use same setup as xr2 or 3 put sandwich plate on the offshore leg.