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There are a few people who opted for the twin turbo route but the biggest problem you will deal with is heat if you place them on the front end. That said, it might be better to have a shop in your area (Advanced Auto Fabrication is one of them and Hank is a cool dude) maybe see if they can design a rear mount setup and piece the components together.
We did a really nice twin turbo super on a c7. But customer could not complete the build due to oil dropping in price issue. so its been sitting in his garage for a little bit. Supposed to be coming back to the shop in a month or so to finish up. it is an trans mount setup.
We can custom build you anything you want though if your interested