If your going the 550 injector route ensure you’ve a TuneECU tuner nearby, otherwise I’d suggest just going with PC-V, as you said it’s most tuners comfort zone.
I have a suitable big injector base map, but You’ll need to get it tuned because I don’t run the carpenter exhaust, and I have higher compression than is normally done in the 240 kit.
The 550s are technically slightly too small for the 265 kit, and slightly oversized for the 240, to fall within 80% duty cycle. I see 88-89% with ~245 whp.