[KingLT1]

On 93 octane you shouldn't need more then the LT1 fuel system at LT1 pressures. On E85 you would probably be close to the limit of needing the LT4 stuff depending on target AFR.

That being said I have never had a issue running LT1 style pumps @ 2100-2900psi in the past. I have ran 3 different LPE big bore pumps(based on LT1 pump) that high and never had issues. And I also know some guys have ran LT4 stuff as high as 3400psi without issues.

If pressure is too high for the injector they will misfire. I ran into this on a set of gen 2 FIC +30's. They don't like 2900psi. Had to turn rail down then they were fine.

Moral of the story I think you are fine either way.