I did a Isuzu 4bdt2 swap in my old Suburban (have a thread in the forum about it). Those are really nice engines. The 6 cylinder I bet is a beast or could be made into one. The 4 cylinder was massive and weighed as much as a 6.5!
Well thats not a proper hose (fuel injection hose) so yeah its going to fail possibly. Even so Ive never seen or heard that it was even a thing. Use the correct parts and should never have a problem.
FYI Fuel Pressure Tap. Buy the original here https://leroydiesel.com/products/leroys-fuel-pressure-tap-fpt/
Ive never heard of a hose between the FFM and IP collapse or have any problem, with our FTB kit it would be exceedingly rare!. If someone wanted I could add the fitting like pictured...