Ok, as a thought, would it be all bad if 6 MPFI injectors all fired at once? I'm not sure about injector impedance, 6 injectors in parallel compared to the single poppet impedance? If the impedance is close, maybe 6 MPFI injectors could be operated by a single CPI injector driver in the '7427 PCM?

6 MPFI injectors that individually measure 16 ohms impedance each, would be 2.67 ohms when connected in parallel. I wonder what the impedance of a 4.3 CPI poppet valve injector measures?

dave w