Depends what you're after. -5's won't blow till 9000 rpm on a 3.0, so if that's what you're after, wrong turbo.
A grunty, lazy 400-440 kw on E85 with a sorted setup without having to spin it to the moon, perfect.
Well each gear, peak boost will be reached at different rpm due to load, will it not?
And farken "full boost". Unless it has some sort of reference to it (eg 25 psi), it's the most meaningless thing ever. Are we talking 5 psi or 55 psi?
Is your mega pump going flat out at all times, Mick? I suppose on the track it would be going nuts anyway, the only time it wouldn't would be in the pits.
Fuel cooler ahoy!
Charlie, why not just buy the os88 shifter. There are two to choose from. A straight one or a bent one.
http://otomoto.mobile034.com/p/8548992/os-giken-os-88-direct-shifter-kit.html
You're going to all the effort to go to a modern single on you're setup. Give it the best chance that it can by going the biggest exhaust you can. The "small exhaust" on turbo engines has been blasted out of the water and a 3 inch on a 8374 won't do it.4 inch with the biggest, baddest mufflers you can find. Custom made (which really won't cost you much more than a off the shelf system). Done.