I went down a similar path when battling a flooding carb.
Here's how I gained confidence in the carb by directly measuring the max pressure the needle and seat could hold, as shared by Cliff:
https://forums.maxperformanceinc.com...errerid=160974
My carb was good for 12 psi (static on the bench).
I replaced my pump but honestly, I don't know that was the issue because I shipped my carb to Shaker455 and he found a few issues that might have contributed.
Mike