OK....I am going to openly display my ignorance here....I had my Ross
PSRU off only one time, when I had the thrust bearing mod done.  I
simply reinstalled it opposite of how I took it off. That was some
time ago, and I can't recall what it looked like where it mated to the
flywheel.  Did the Ross also use an auto flex plate?  I remember the
shaft was splined. That's about all I recall.  I am asking this,
because I have purchased a set of street ported 4-port plates to which
I will add a set of NA rotors and housings to build up a complete
engine so I will lessen my "downtime" by hopefully swapping engines on
a weekend. I would like to have this new engine ready to bolt on and
run. I'm assuming  that  the stock, cast iron flywheel I have if from
a standard transmission RX7. Are the automatic and standard flywheels
different, or do you just add an automatic transmission flex plate to
the cast iron flywheel I already have?  Just when I thought I had
everything figured out, I start reading new posts about flex
plates....
     Thanks in advance for any and all replies/suggestions.  Paul,
     what the heck is a flexplate, Conner