I'm in the process of gathering all the parts to do an LS-1 12in disc front and rear conversion on my T-Type. So far I have all the LS-1 brake parts front and rear. I'm still waiting on my mounting brackets for the fronts to be cut but after that I will just need to gather the smaller stuff. Hopefully I will be getting started in the next couple of weeks. I've been talking with Bruce a little bit about this and getting pointers from him, this is what he has on his car. You will definately need 16in wheels.
I have the ls1 brakes on the front and in the process of installing a set of 92 camaro rear brakes. That caliper has the cable E-brake on the caliper. I will let you know how it goes and try to get some pics.