Screw the check valves and fuel pressure regulator.

Get 450 cc/min fuel injectors from an old DSM, the injector resistor box from an '88-'91 Civic, Accord, etc, a nice fuel pump and an A'PEXi S-AFC or V-AFC.

Set the fuel trim on the AFC to -40% across the RPM range and voila. No check engine light because the AFC modifies the MAP signal and the right fuel curve. It'll work right, just I don't feel like typing it all out.