Need to spit more fuel out of the delivery system: bigger injectors or regulator?

I'll need to get the fuel delivery system to spit out alittle more fuel than it is, the question is, what's the best way for my application (little drag track racing and mostly street killing) :

bigger injectors (atleast bigger than 99 ls1 stock)

or an adjustable fuel pressure regulator set at about 4-6psi (which puts it at about 30-40lbs at idle)?

KASR

i'd say bigger injectors and if you need it aftermarket fuel pump...