I have 2 1980 280zx and 1 early 260z. But I never really measured anything like that. I do know the zx had trailing arm suspension which consistantly underperforned throughout history. I'm sure its possible all you gotta do is turn some bolts, cut a knuckle, and compare some metal to get what you are after. Then you will know and it wont matter what I know or claim to know. Oh and be sure to ask if it was an actual 2 feet of stopping distance gained from 80 mph, or more like a foot and something when you talk to people who did that conversion. If your car is so powerful that the stock brake system was a liability then I would expect you to be asking about 4 piston front calipers, or the larger 15/16 280zx brake master cylinder and bigger booster right in front of your face that time you opened the hood.
SAMSUNG-SGH-A707/1.0 SHP/VPP/R5 NetFront/3.3 SMM-MMS/1.2.0 profile/MIDP-2.0 configuration/CLDC-1.1 UP.Link/6.3.1.20.06.3.1.20.0