The 6" MC has a bore of 25.5mm and a stroke of 34mm. I measured the one I pulled from the 94 (I knew I wanted that for a reason besides just the res).
Giving it a surface area of 80.110612666539727580797406273627 square mm'*,
and a volume of 2723.7608306623507377471118133033 cubic mm'*.
((d*pi)*l)

Assuming the the 8" MC has the same bore but an increased length stroke, it'* got an 84.8mm stroke. By that reasoning it'* a got a volume of 6793.3799541225688988516200520036 cubic mm'*.

That'* a difference of 4069.6191234602181611045082387006 cubic mm'*!!

Well I measured the MC and she'* a 6 incher. Got the one with the reservoir at Advance Autoparts for around 60 bones. Works like a charm. No more leaky.

Cool. You've got a 6"...

However, I'm still wondering the difference between vehicles requiring these different units, or measurements of the GM Unit.

bigger equals better. At least that'* what i'm going to say.


-justin

Nope, Not with brakes.

read the tech articles at www.teamscr.com Great guys, GM too.

How much is a master cylinder? My brake fluid keeps running out each month and I have a feeling its the MC leaking because thats what Ive been told here I believe.

Go back 5 posts and there'* your answer.

lol thanks!