Joe...
The Phat Shaft and Super Phat Shaft series are turbos made by Industrial Injection and they are all based off of the S300 chargers.I'll stick with what I said earlier and reccomend a set of twins for your Burban if your wanting quick spool for racing as you will never find the "perfect" single charger to fit what you want to do.If you go for a qucik spooling single you loose on the top end and if you want one to run hard up top then you loose the low end spool up.

If my truck was a automatic the charger thats on my truck,its a High Tech Turbo Pro-Street 66/71/13ss,would be a real PIA to daily drive as the low end lag would show itself.The low end lag of this charger is easily driven around with the tighter stainless steel exhaust housing and my 5spd as I can get it to drive through the lag wall without any surging.As I said,I gave up the quick low end spool of the 62mm for the top end charge of the 66mm and I just deal with it.

Dan...
Not a big deal,I have someone looking for a tighter exhaust housing for your HT3B.

thanks hammer, i looked forever on the web, but i called my local diesel injection shop to see by chance if they could do anything, and he said hed call the turbo exchange group and could prolly come up with a 23cm housing for under 200$. im awaiting a phone call. hopefully it goes through! thanks

Do you know how much your 66/71/13ss lbs per minute is?