miata seats in xj mounts

any one ever done this before?just curious,as im gonna tackle this tomorrow,i got 2 seats that have the speakers in the top!any ideas or tips would help! thanks guys. will let you know how it went

do you plan on runnin the miata rails on top of the xj rails or just the actual seat back and bottom to whats there?
I have a set of 03 wrx seats, planning on welding them to my electic bases, sweeet firm side bolster