OOOH, OK! That's a diff story

Ok, but still, The diagram you draw will keep working from 87 terminal no matter if run circuit is linked with 87a, because the 86 terminal will keep allways hot... UNLESS, the reduced voltage coming out from ballast to feed the coil is not able to keep activated the relay at 86... what I don't really know. Never have tried to keep those relays activated with the "low" voltage could come from the ballast.

A diode will definitelly help just between ballast and splice feeding 86 terminal on ign 2 circuit, to be sure the low voltage coming out from ballast on RUN won't activate the relay and the voltage coming out from 30 to trig on the EFI will keep working with 87a 12 volts coming from ign 1 ( run )