I went up to the 11" brakes and I absolutely LOVE them, but I was curious...now that I've bit the bullet with the spindle and strut change, is there anything better for 16" T/C rims? Would 12" brakes be even better? How about dual-piston calipers? Better brake lines or master cylinder? Brake booster? Now that I'm off the 10" rotor handicap, I'm just wondering about what's possible while keeping my T/C rims.
Upgrade the front calipers to the 73mm Mark 7/SVO size, and convert the rear to disc using TC brake setup and axles. Be sure to use the proper booster/master cylinder combo, and possibly upgrade to an adjustable proportioning valve. Your options get better if your willing to upgrade to 5 lug and lose the TC wheels.
Steeda sells the Baer 12" brake upgrade kit (http://"http://www.steeda.com/products/baer_12in_brake_kit.php") in 4-lug. This is the largest brake size that will fit under a 16" TC wheel. The kit was originally developed for racing where the stock 16" Mustang wheels must be used.
SSBC (http://"http://www.ssbrakes.com/") has some kits but they appear to be 5-lug.
You'll probably run into this a lot, where nothing but 5-lug is available.
You can adapt Mustang braided brake lines as well. Both front lines and the one to the rear axle can be made to work. If you have rear discs, the short rubber lines to the calipers are all that's available.
I recall looking up 12" four lug brakes, I think they were from Bear. Didn't seem cost effective at the time ($1,200-$1,500). A google search should bring up some choices.
The 73MM calipers do make a difference. Maximum Motorsports offers a Hawk Brake pad kit and a stainless steel slide upgrade for the caliper.
An upgraded MC and proportioning valve is recommended with the bigger piston caliper.
Rotors which are slotted and or drilled/dimpled are also available. Cragar offers a Cryo treated drilled and slotted rotor. Kind of pricey, but a step up. There are lots of cheap ones out there too, but who knows on the quality.