A little Turbo Selection Help

TT5.9mag said
Looking at the specs for that, I think they are being very optimistic when they say “up to 420hp” for that size compressor. That being said, I think you’re in the ballpark for a 225 on the sizing. I hate internally wastgated turbos and I’d rather see you use an external waste gate but that adds cost and complexity. What is your hp goal? That is the most important piece of the puzzle in turbo selection.

I'm not worried about "420hp". I don't know. Haven't really thought about it yet. All I want to do at this point is get the engine built and get it in the car and running and then I'll see how it acts and start tuning it. Maybe 300? 325? And I don't mean just a time or two. I want it reliable and I want it to last.