I'm running a Motec with Walbro 500HP fuel pump and a fuel pressure reg through MY00 stand injectors. I'm making 207Kw atw using 1.2 bar of boost with injectors close to being max injector cycle with a safe air fuel ratio. It's my daily driver!

So changing out the injector isn't really necessary unless you're chasing big Kw's. However I would re-route the plumbing to the injectors, I can't rememeber which cylinder but by is current design one of the cylinder runs lean.