How many PSI are these rated at? I know I should be fine but I'm seeing about 76psi right now and it makes a me wonder

Depends on what it's made from. Some flex lines are good for over 3000 psi.

I know that KB hard anodized aluminum fittings and stainless braided rubber lined hose will hold 300 PSI, because we tested with nitrogen and tagged each of our shop made hoses. NHRA rule.

Mine is the Jegs or Summit house brand most likely.

That clear braid-reinforced PVC hose has a working pressure of around 250 psi.

As one who has more tied up in braided hose and fittings than I have in my every day driver ( the whole car ) , my advice is don't skimp.
The brand name fittings and hose are noticeably better in both fit and construction.
Russell and Aeroquip cost more for a reason.
If you are concerned about show and tell , go with Chi-Com.
If you want quality , pay for it.
One way I kept the cost down as by scouring Ebay for used NASCAR team stuff.......the fittings are reusable and a lot of the hose is both perfectly fine and well insulated.
I didn't use a ton of the hose , but I used all of the insulation and most all the fittings.
Heck , I probably have enough for my next deal too.

The clear hose is for my puke tank system.
I'm just talking about the fuel line.
I was thinking there rated at 300-350 but was not sure. Ill check mine at double my working pressure just to feel a little more confident about them.

300 psi is what all my fuel line is rated at... I'm
gonna run my fuel pressure at 55 psi on this set up
but will be going to boost on the next and will use
the same hoses