Not to tell you not to sell, but most of the people with a built transmission (including all of the "Top 10") use xHP in addition with the built trans. They're not exclusive purchases.
100% the best way to manage heat is to put the turbo somewhere where the heat moves away from intake parts. The top, close to the head and the intake manifold is not that place.
I'm around tomei exhausts and verus diffusers all the time. I really really doubt it's going to fit. Even with that adjustability. I don't think it will, but I could find out. Just swap an exhaust or something.
That is a bonkers US Shipping Price. I shipped four wheels cross-country for $50 a wheel. Supplies are just sheets of foam over the face, then movers wrap the fuck out of them. Slap a label on the wrap. Done and Done.
As always, use pirateship.com for shipping for dirt low prices.