51 Chevy frame notch

I'm thinking about notching the frame on my 51 Chev. I've got air-over-leaf bags now but I want to get the rear lower, so I'm planning on redoing the rear set up with a notch, new airbags new drive shaft tunnel etc. My question is: Does anyone know how big a notch a can use with the stock torque tube rear end and not run into problems with it?

 

Gambino- he's the man!

 

Ya beat me to it! Got me a Gambino notch in my 52....give Alex a call, he can help you out....he's under the name "Gambino Kustoms" in the member search.....good luck...

 

Thanks Guys. Looked at the Gambino notch kit and it looks like what I'm looking for. I'll try contacting them.