you'd use the 4AG mechanical distributor to distribute spark. the ECU drives the igniter, which drives the coil, so that can all be run externally from the distributor. in that respect, the toyota coil is likely close enough in specs to the honda stuff to just use that. i actually ran the toyota coil and igniter on my setup, but the IGT signal needs to be inverted and clamped to 5v to do that.
i do have some circuits drawn up that should work as COP drivers, but they're not tested at all. alternatively, you could cut 7 notches into the crank pulley and run a GM DIS module, since it's essentially a standalone electronic distributor.