One more 19's vs 24's question

[Coupe50h]

Well I did some research here, and there was alot of good info, I believe unit5302 was in some old threads on this subject, but i want some fresh opinions now, and being my car is revved to the moon on every run down the track, also not a daily driver.
Would i be wasting money right now since i need mufflers at the moment too?
I have currently 19 lbs, but not stock, they are the black and blue delphi/lucas without the pintle cap design, im assuming they can hold up to 350 fwhp with the right psi according to the research here anyway.
I probaly have 300 fwhp easily, so what should i do? I already have a maf setup for 24's in my garage, what about matched injectors? the analyzer says i'll have to run 31 psi with 24's, and i do not want that low of fuel psi.
Thnx.