Hi-flo single turbo kit
They said would have delivery in think it was 5 weeks or so which seems reasonable to me. They have a very nice single kit as well.
I can't of course give an absolute endorsement of my kit until it shows up and I check it out.I have talked to one of their customers with the twin kit like mine and he is very very pleased with his.
The hi flo kits look ok too but really waiting for like five months would totally drive me nuts!
The problem with these ls1 kits is they are all custom kits from small shops. Unless you want an sts which I didn't or a procharger or vortech.
So you put down your money and take your chances and there have been several failed turbo companies go down and take a lot of money with them..INCON think also CAS.. to name two.

