Need HELP! Fuel problem?

[Tony91LX]

I have a 351, with Trick Flow head, Trick Flow Intake, 24lb inj, and a 190 fuel pump.

The car pulls hard and strong through first and second gear, but third gear at 4500rpms the car noses over and won’t rev any higher.

I started with 42 lbs of fuel pressure (vacuum off) (plugs electrode white)

at 46 lbs. a little better but still has trouble in third (plugs electrode white)

at 50 lbs. even better but still has trouble reving to 5,000 (plugs electrode white

Last try was
58 lbs. worse, third gear would surge at about 3,500 that’s when I shut it down (plugs still looked lean)


Do I need more fuel pump or larger injectors? or is it some thing else?

Thanks