Dennis & Bill, No reason not to use the RX-8 coils, the EC2
will work with them (be sure to specify this when ordering EC2). The
RX-8 injectors are fine too, very compact and light. The EC2 now has
the ability to be setup for the different primary & secondary flow rate
injectors as used on the Renesis. It is a pain to adapt the Renesis
block to fit the earlier 13B injectors anyway.
The regulator is not what you have on the engine. That is a pulse
damper. Regulator is in the fuel tank I believe. You will need a
separate 3 port (manifold referenced) regulator.
The RD-1C requires that the engine be equipped with the auto
counterweight (rx-8 model) and a 1986 - 1991 RX-7 auto flexplate (it
fits). Don't use the spacer on RX-8 auto flywheel if you happen
to have it.
No problem removing one tension bolt at a time, won't hurt
anything.
Tracy