Ebay GT45 Turbo

I built a Ford 2.3 turbo engine a few years back and got a similar ebay turbo for it and I just have to ask, why didn't you get a turbo with the waste gate built into it? Mine was and it was fully adjustable. Oil and water cooled with a waste gate. It was just a tic over 200 bucks. I'm rolling around the idea of a slant 6 turbo engine and if I do it, I'll go the same route.
Everything I have seen with a wastegate is not a big enough turbo unless I decided to do a twin turbo set up. I am also wanting to keep this turbo for the next engine. I have a 340 with a 3.58 stroke crank that I will install at some point once I figure this tuning out. This will be carbureted on E85.