Hei Swap with Toyota Alternator
Don't overthink. In the factory diagram, see the bright blue? THAT IS "ignition run" as it was originally wired. Now, that will go to coil + AND to your HEI "hot" terminal.
I have no idea how Denso's are wired, there are several different ones
If the Denso has an "ignition" excitation wire, then that should go to ignition run........same as the "new" coil +