My quest for a 9, I failed.

I would just flow test the system at the desired pressure and see what it will support.
The system is either up to the task, or it isn’t.
Easy enough to find out.

I have a customer who recently put together a 440 powered street/strip car.
Nothing too serious...... mid-11’s.
He had some sort of Holley 150 thing on it that was absolutely not keeping up.
By the specs, it certainly looked like it should.
If I’m remembering the story right, they had a Holley “Black” 140 on their other car, and they put it on this car for a test.
The problem(motor laying down after 1/2 track) was gone.

Nowadays, when I suspect there might be a fuel delivery issue...... I don’t rely on the specs so much.
I flow the system.

For Justin’s combo, the system should be capable of filling a one gallon can, while maintaining the desired pressure(5.5psi in his case), in just under a minute.