Bah. That's kids stuff. You've already proved your very dangerous with a mig welder. Get some piping and build yourself a hotside!
I've done it several times before. Of all of the turbo projects I've had, everyone has been custom fabricated.
My question is this: (Keep personal bias's on the back burner)
Every other month you read where some mag has taken a 70-76mm Chinese turbo, that cost $400-500.00 and made butt loads of power (592 FWHP) on stock JY applications. http://www.hotrod.com/techarticles/engine/hrdp_1105_592hp_46l_2v_motor_for_2298/viewall.html
Stock induction, stock internals, stock heads, blah-blah-blah.
If I was to consider something like this I'd start w/ one (or two) of these turbos. I wouldn't try and make anymore power than the stock internals would safely accomodate. I'd have to look long and hard at whether I'd just run E85 w/ no intercooler, or use Premium gas, and water/meth injection to intercool it. I can get the blow through carb built for either fuel.
AND
Will one of these things last for any length of time?
The article goes on to compare a turbo like the one you have against the Chinee one tested, It ran hotter, and made less power at the same boost levels. If I understand, and compensate for it, ?????