If you are going to run a turbo that others on here haven't run I would learn about them a little more. The T70 on ebay should use a 70mm inducer on the compressor wheel instead of the 60.5mm on it uses. It also uses a P trim wheel, with a .84 hotside, you will have quite a bit of lag ( a high boost threshold if TonyD is reading:D).
The Ebay 60-1 should use a 60mm wheel not a 57T, whatever that is. If you are tyring to save a buck I would do the Holset as people on here can tell you were it will come on at and it is T3 flanged.
For full T4, I know an O trim with a .68-70 hotside or P trim with a .58 hotside will spool fast on a L28, you pick the compressor wheel for you HP goals but I would run a 60-1 for what you want, the injectors you have will limit your power first.