I have done something like this. I have a 94 LX accord and put a 91 lx motor into it. I used the 94 head and the block from the 91. it will work but the motor is gonna lagg big time and then if your like me redline the motor just to get up to speed, your gonna blow the head. The head gaskets are not the same. The coolent passage is not gonna line up(well for LX motors) your gonna blow the head sooner or later.