First hand experience with changing to the NBS master cylinder WOW!

[speedygonzales]

Originally Posted by CDR

Vacuum-boosted:
JB5 = Power Brakes, Disc/Drum, 6,400 lb
JB6 = Power Brakes, Disc/Drum, 7,200 lb
JB7 = Power Brakes, Disc/Drum, 8,400 lb
JB8 = Power Brakes, Disc/Drum, 10,000 lb

Hyrdaulic-boosted:
JD5 = Dual Power Brakes, Disc/Drum, 6,400 lb
JD6 = Hydraulic Power Brakes, Disc/Drum, 7,200 lb
JD7 = Hydraulic Power Brakes, Disc/Drum, 8,400 lb
JF9 = Hydraulic Power Brakes, 4-Wheel Discs

There is also a SMALLER DD booster available... Is that what you have on your JB5's?

I have no clue All I saw was "DA" and it measures best I can see at between 10 and 11 inches.

Now above you say JB8 was vacuum but all the information I saw was it was Hydro. If it is vacuum, I want it.