Blackbodyws6

So I'm heads cam ls1 and when I tuned it my stock (I believe) 28lb injectors were maxed out. I also have a very basic zex wet kit right now jetted for 125 shot. I feel that the kit isn't doin as much as it should, now the car is not tuned for nitrous also...so would the fact my injectors already maxed out on motor not be sufficient enough with the spray? I would like to get a lingenfelter box to pull timing and also would like to up to a 150 shot. I know I should get injectors anyways and was thinking 42lb ones will that be enough? Thanks in advance