IIRC the turnaround time averages 4 weeks. Had to send mine back last year sometime when I junked it and got it back in 2 weeks but they said to expect more. I think that it varies based on where they are in production / how many orders they have coming in. If you call them and ask someone they'll give you a (more) definitive period. They're usually pretty good to work with.
What's your rack getting rebuilt for?
aka "The Maybe-Not-So-Evil B$*&#"
289 v8, Powerjection III EFI, mild cam
4-speed, 3.25 9" rear
Power disc brakes, Unisteer power R&P
Pertronix ignition, RetroSound Model One radio, Classic Auto Air A/C, etc...
Three years of work for three days of perfection. This pony WILL get back out on the road and it WILL reliably take me where I want to go... and it will always, always keep me safe.