Just to clear this up. The JB1419 is not a 15/16th MC, its 1" and is a Patrol replacement, not 280ZX.
However it will fit all of the early zeds, I know, cos I have one in mine and its SOLID!! lol
It may be a little too much for some brakes though, so keep that in mind.
Oh! That means I have to ask;
Is a 1" JB1419 going to be "too much" for the Hi-Lux callipers on solid rotors at the front and the standard rear drums?
I don't foresee myself doing any further brake upgrades than this.
I note that your car (Scott's) has;
"Front brakes LN105 Hilux 4 piston calipers with DBA slotted rotors
Rear disk brake conversion, R31 callipers"
- so when you say its "SOLID!!", should I assume that it will be TOO SOLID in my car?
*edit 21/1/2011* - My solution was to buy a new Nabco reproduction 79-81 280ZX
Brake Master Cylinder from Rock Auto USA for A$221.64 delivered.
Photos can be found in reply #2 on this page;