I'm with formula here... . your boost is normally in/around the 13-15psi range with a "stock" setup.....
You can pretty much bet that someone has been into the pump OR you have an uprated injector in there now... .
25psi is too much for a system that has not had: injectors or pump work done.
Especially with an h1c ... ...
Last, wait for the Lucas to go in, like the guys say... . you might find you'll have other issues to consider once they're in..... for example some smoke or temp issues.....
The only reason I mention this is because it really does sound like there has been some pump tweaking done already... and BTW, that little cap can come off and on without showing any signs of tampering... finally the lock collar almost always shows at least one or two threads on the end. We have 5 brand new ones in the shop and they show some thread. You can tease the lock collar backwards by puttting a 13mm combo wrench on the locknut, and a 6mm 1/4" ratchet on the screw end and crank the locknut back against the lock collar,,,, eventually it will hop back a couple threads and still look stock/intact. .
Pastor Bob.