The issue is the pump flows less and less as pressure rises. Most GM applications start at 50psi so as long as the pump can keep up you should be ok.
Same pump I have, you should be ok. IMO a tune and bigger injectors should be priority.
I remember someone tellin ya to keep the AFR around 11.5.....
Be glad you lifted, usually you dont get a second chance the engine usually just comes apart on ya.
starts to lean at 5700... I would shift at 5500
That curve looks really strong, must pull like a train