Ok Dave the "ACT" "Streetlite" 13.8 lb flywheel was just delivered
and I am in process of taking
your measurements to see where we stand................This flywheel is a
thing of beauty (to a RotorHead)
and my RD1C drive plate will bolt to it with no problem (through drill and
spotface the rear of the flywheel
because it has a slight taper in that area).............I just have to
verify just where the RD1C drive splines
will be positioned (fore and aft) on the input shaft compared to the RX7
flexplate.............The clutch plate
friction area is slightly raised (about 0.065) above the clutch mount area
and I would probably take it
down tto the clutch level (probably not necessary but would reduce weight
slightly.............I have a 93-95
Turbo starter on the way (should take care of starter mesh
problem)..............If you are interested I can
guide you to another 93-95 starter (used $49.00 with/shipping) if it is
still for sale.............
               I suspect it may be the diameter of the NA 13B flywheels and
may use the 86-91 NA manual trans
starter............You need to talk to the manufacturer..........They are in
Lancaster, Calif............The 9.8 lb
version is a little more expensive due to more extensive machine work to
reduce weight.............See the
link below............The link to THMotorsports has the best price I have
found on the 9.8 lb flywheel......The
photo on their page is not the Rotary 9.8 lb version...........

http://www2.advancedclutch.com/products/xact_flywheels.aspx


http://thmotorsports.com/act/act_flywheel_prolite/600140/i-47718.aspx