Master Cylinder - will it work with my truck?

[desertPOS]

Well I had another thread going for this, but doesn't seem like anyone's looking at it. I just picked up a crossmember from a '90 3/4 ton burb, and just started cleaning it up so I can swap it into my '69 C20. Also picked up a master cylinder out of (I believe) and 80's pickup or suburban, but not sure if it'll work or not. I know the bracket will need to be redrilled or modified, but that's not a big deal. I just want to know if the stroke of the 'push rods' inside the thing will be the same as what I have now. Basically, just looking for insight as to whether I can use it or not, and what you guys think it's out of. If you think I should keep looking for another, please let me know... Maybe no one on here can answer, but if you can, THANKS ALOT!!