if i was told that my injectors or pump were close to thier max, i think id get something done.
I would say theres possibly 2 kinds of "maxed" here, maxed and wouldnt want them to be put under any more load, then theres "maxed" ie:cant take anymore and need bigger injectors full stop.
Either which way id rather have a HP fuel pump and/or bigger injectors
I also think 380bhp is safe with 400bhp pushed.