Fuel pressure regulator question ?!?

OK so here it is. I have a 97 SVT cobra. In the past month I put a lot of upgrades on the car. Not to mention I just purchased the vehicle a month ago. But here’s my question so I put a 340 LPH fuel pump and also put a Aeromotive Fuel pressure regulator. I also went and purchased a fuel system gauge to test my fuel system but I do not know what psi I should be running. So what would the stock psi be for my fuel pressure? I have read so many threads and have seen so many different answers I don’t know what psi is correct. So I took a guess and will set it for 30 psi with vacuum and 40 psi without vacuum. I also have other modifications. Car seems to be running fine but I’m just Wanting to make sure everything is fine with my car please help. Much appreciated thank you

40 is stock and base pressure can only be set with the vac line off

unless you bolted on a blower or some nitrous then a stock 190lph pump and a stock regulator would have been much better to use.

Stock is 160lph, not 190lph, far as i know