Single T3/t4 Hybrid On 06' Gt

I was offered a Garrett t3/t4 hybrid from a friend very reasonable price. He is redoing his build thing is i'm completely unaware how a single t3/t4 hybrid would work on a 4.6l anyone running one or have any knowledge or anything on that. just kinda wondering what I would get out of it any info would be great.
 
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