i hate it too, the exhaust is more of a pain in the ass... ive been scraping it all the time, if something falls down god forbid then its fuel pump time. How long can you leave a fuel pressure guage on there for?
I don't have a schrader valve, i have it removed for an adapter that runs 1/8NPT to my fuel selenoid for my wet kit. So I removed the fuel hose that came with the guage, and screwed it the wet kit fuel line right into the guage. I've had it on there a day or two, kinda coming out of the hood so i can see it on the windshield. How long can you normally keep a guage like that on there for? It just started making this annoying rattling noise that i thought might be the engine, but it turns out its the guage rattling. Shoulda just bought a autometer one for the money and been done with it.
The only bad thing KK is that if it doesnt hold line in the line after the engines off, I can't test leak down to know if say one of the injectors is leaking because the line doesn't hold pressure.