I'd personally run AN fittings and lines.
It's crazy to use hose when metal or OEM-style plastic tubing will suffice.
Hose has a shorter service life, is more porous, weighs more, and is far more expensive than double-wall seamless steel tubing.
"AN" hardware sold by most online retailers is NOT actually "AN" spec. "AN" is a long-obsolete military-grade specification; what Summit and Jegs sells is industrial-grade not military/aerospace grade. (Deceptive advertising)
I have an EP381 Delco pump in tank, -6AN fittings from tank to TBI, a really nice Holley ADJ FPR with-in that setup also, because I have it regulated down to TBI pressure currently from the 58-60psi the the EP381 puts out.
When I replaced the pump in my '88 K1500, I used what was then supposedly the "hot tip", the EP241 pump. There's no need for an external regulator because the OEM TBI regulator is perfectly capable of maintaining the 9--13 psi spec'ed for the TBI system even when used with a so-called "high pressure" fuel pump.
As long as the return side of the system is adequate, the pump only produces the pressure the regulator allows.