This is a guess, since I haven't done that before, but chances a real good you'll have to modify the RX7 seat adjusters, or remove the B2200 seat adjusters and install them on the RX7 seats someway.
I just did a set recently.. driverside you change out the seat tracks and widen the holes a smidge.. passenger side you change out the tracks..and widen the fronts and the passenger side rear and the one closest to the tunnel will need a spacer to match the driverside .. it sounds a lot worse than it is but they do work and fit nice