[kansei]

Originally Posted by rxtasy3

engine to tranny pattern is the same. u could probably use the flex plate off the 73 on the 84 but to keep balance u'll need the auto counter weight for the 84.

Be careful here- 1973 was a split year, twice over. I'm assuming you already know that if youhave an early '73 with the top mount starter, nothing will line up with an SA/FB engine rear iron. Even if you have the bottom mount starter on your RX-2, you may still have the early bottom mount starter rear iron, which still would not permit your trans to directly bolt to the SA/FB engine, as those still shared the earlier bolt pattern of the top mount starter engines. Only the very late 1973 cars with the single distributor engines (note I said very late '73) might directly bolt up to the 1st gen engine without trouble. If you have a typical 1973 model, you probably have a dual distributor engine, in which case you need to research the VIN splits to make sure everything will bolt up OK before tearing everything apart.

The engine mounts on the earlier RX-2s and RX-3s are different than the RX-7s, though you should be able to just swap the engine mount bar over from the RX-2 engine onto the RX-7 engine and continue running the RX-2 engine mounts. IIRC, the geometry of the RX-2 front subframe engine mount brackets will not permit the RX-7 engine mount bar and RX-7 engine mounts to be used without altering the angle the engine sits at, nor keep it level side to side. I know there is a way to make it work properly using a mix and match of different pieces, I just don't recall offhand what that combination is.

Neal.