Well the turbo kits came in today so I was able to get busy working.
The price was good enough so that i went ahead, and bought a kit for both turbo's, and got the upgrade to a 360 deg thrust bearing.
I've built quite a few of these over the years, and the only really tricky part is to mark the impeller to the shaft so that you don't go off the balance.
I know this is debatable, but I like I said I have been building these for years, and have had zero problems.