bbf in a 86 mustang brakes question

what all do you guys do for brakes in a foxbody mustang when you put in a bbf? i bought an 86 yesterday with a 460 swapped in and it has manual brakes that are not work a crap! all the pads are new on the front and they are bled properly, the rear are new but not adjusted to work. i guess they left off the rear to do some burnouts!

http://www.aerospacecomponents.com/index.php?option=com_content&view=category&layout=blog&id=23&Itemid=63

and relocate pivot point

http://www.aerospacecomponents.com/images/instructions/Mstr-Cyl-Con-Kit.pdf

I have the Aerospace Manual Master Cylinder Conversion kit on my 89 Mustang with the pivot point relocated and they work fine.I bought the kit from Jegs and it runs $159.99,Later Mark.