Sounds good!
I would suggest using a stainless tubing for your u-bent part. Using a plain steel will corrode in no time & get weak.
You can buy thick wall stainless u-bends on Ebay

With schedule 40 or so,, thick wall tubing , it will support the turbo much better.
They are already chamfered & ready to weld.

You can buy schedule 40 stainless tubing or plain steel from McMaster Carr.http://www.mcmaster.com/
They have different angled pieces to fab your U-bend pipe.
Or get some ideas here: http://www.sdsefi.com/tech.html

Fabricating a Turbo Header

Should not be too complicated.

Any more Q's,, let me know, goodluck!

MBHD


12 port SDS EFI