Jwhite, I think he may be confusing running dual cp3s with running larger injectors, so he can turn down pulse and timing.
Austin, LB7s like rail kept above 21000 at a minimum to keep from losing power. The higher the pressure you're able to maintain, the better. Otherwise turn timing and/or pulse down until you see you can maintain pressures.
Larger injectors will help you keep timing and pulse reasonable, which helps immensely with keeping the spray pattern in the piston bowl, but they don't help with keeping rail pressure up at the same power level.
If you go bigger injectors, I'd also do at minimum a 10mm cp3 or dual setup. Stock cp3 alone won't be able to keep up, and you'll simply lose power.
Boy, those LB7 rods are going to hate you, if they aren't bent already. Have you done a compression test yet to check?