Kind of. It will physically bolt on, but the lift bar that goes from the tractor's rockshaft to the hitch rockshaft will need to be lenghtened, and it may not have the right geometry to work right with Cat 0 plows. The arms attach lower on an SGT 3-point than they do on a GT hitch like the 1861 hitch is. I don't think the plows will go far enough in the ground. That's just an observation though, and I don't know if it's true or not.
Now that's I've throughly confused you, the short answer is, with some modifications, yes.