Just quit

I'm jus saying;
On the street; My Orange box had no problem hitting 7000, in two gears ; maybe because with 3.55s I never get to 7000@83mph, in second gear very often, IDK. But 7000 in first was many times every day, for a few years.

The 5-pin Orange box needs a running voltage reduction, that is different from the factory coil. You can run a "dual" ballast resistor, and hit both at once, or you can run two different resistors one for each. Some coils need a different resistor from the factory as well.
If you have a 4pin ECU it is able to deal with battery voltage, so it doesn't need a ballast resistor.

I'm pretty sure that I have run a 4-pin ECU in a 5-pin harness with a dual ballast and it worked just fine. AFAIK that 4pin ECU draws power off a different pin, so the dual-ballast just "deadheads" in the connector.