There are a lot different BBK's and I for one was getting confused by the differences, so I've compiled as much information as I could about each. If anyone has any addition info please chime in

Stock Mk3:
1-peice 11.9 X 0.9" front rotors, single-piston calipers
1-peice 11.5 X 0.7" rear rotors, single-piston calipers

Rotora:
2-peice 13.0* X 1.2" front rotor, 4-pot caliper $1590 (MVP group buy) $1700 regular
*= 13.2"?

NightPager:
MKIV tt front rotors (1-peice 12.7X1.2"), 4-pot Nissan 300Zx calipers

Fastbrakes:
13.0 X 0.8" front rotor (1.0 and 1.25" thicknesses available) Wilwood 4 piston standard, 6 piston optional $1,849.00 and up

Precision brakes:
same as above except $1,399.00 and up

Brembo:
2-peice 13.1 X 1.26" front rotors Brembo/F40 4 piston fixed caliper $2699.00

Jim King BBK:
2-peice 13.0 X 1.25" front rotors, Wilwood 4 or 6 pot calipers

Stock MKIV tt:
12.7 X 1.2" front
12.8 X 0.6" rear
(Front is very difficult to retrofit, rear can be done with little work.)

Stock 300ZX tt:
11.0 X 1.2" front, 4-pot calipers (aluminum on 1990-1992.5 TT's, and iron on 1993-1996 TT's)
11.7 X ? rear

Jeff, there is also a Night Pager kit that uses the MK4 rotors, and the LS430 (4-piston) front calipers. From what I've been able to estimate, this setup will just barely fit inside of MK4 TT front wheels. I'm hoping to get this installed on my car over winter break, will update on how it works once it's finished.

cool, do you have a link for it? Be sure to take pics when you get it installed

Endless also has a BBK for the MK3. Mike U had it on his car

cool, do you have a link for it? Be sure to take pics when you get it installed

Here ya go, but be warned - it's all in Japanese :eusa_ange

http://night-pager.com/parts/toyota_sports/jza70/jza70_ucf30_f.htm

I've got everything I need for the conversion, just have to have the rotors machined to fit, and machine out the brackets. I have all the measurements, except for caliper/rotor clearance (yeah, I'm cheap, making the brakets instead of ordering them from Japan ;) ). Finding someone around here with a lathe big enough to do the rotors has been....challenging.

Edit:just did a price conversion, at current rates (9/23/05, ~10:30 pm edt), it's 1760.08 USD, I'm guessing for the full kit. Shipping not included :D