rear brakes and rear axle questions

[fastsaab]

ok im new to toyotas hopefully i dont get burned for asking a sort of unrelated question. i want to install a toyota 10 bolt in my pinto circle track car. i have all the tools and the ability to do it i just need some more info. i like the toyota rear ends because they are well built and have lots of gear choices that a ford rear end doesn't. i got a rear axle out of 1981 celica supra thinking it was a "t" series rear axle. the car had an engine fire and the firewall plate was unreadable. so now i have an axle with disc brakes but its not a 6.7" rear end. i want to get a "t" series rear end with the 6.7" size ring gear there is an 1982 and 1985 celica in the same junk yard with a t on the firewall plate can i use the disc brakes i have on the t series rear axle?

also does anyone know if theres an aluminum third member available for the 6.7" housings?

thank you in advance.