Kingquiet13

I’m just curious if anyone would be able to help. I have a 1986 200sx with a bad top end. Piston snapped, as well as bad gouging in the cylinder. I have a 1987 trx250 top end and was wondering if this would mount up and be able to run on the 200sx case. They are currently at 2 different locations and would rather not waste the time to get one or the other if they aren’t able to be combined.