Fuel pump question

[4carbcorvair]

My dad passed in 2012, my mom gave me his 97 GMC 5.7 auto. It showed up DOA, needed a fuel pump. Installed an Airtex pump, lasted almost 4 years. less than 1.5 years ago I installed a Delphi, it started acting up a few weeks ago with either hard or no start, low pressure. So I picked up an E8248 inline pump. Well, the thing is loud as heck, whines. Just for poops and giggles I wired the stock (weak) pump in so the stock pump is almost acting like a lift pump. It did quiet the inline down a little, still louder than the engine.

My questions. Is it possible to fry the relay with two pumps wired in? And two, could I possibly blow out the regulator with too much pressure?

It starts and runs great right now with two pumps.

At this point, I think I'm going to install a new in tank pump due to the whine of the inline.

I've read that the Delphi or ACDelco pumps are the best. After my Delphi lasting a whopping year plus, I have my doubts. Any other recommendations?