Disc master cylinder size

[MetalManiacAZ]

So as I'm anxiously awaiting my rebuilt dual diaphragm Bendix from Dewey/Steve, I've been cleaning up all my junkyard conversion parts for installation. Other than the booster, my spindles, calipers, rotors, distribution block, and mc are from a '73 Town & Country. One thing I noticed though, is that the '73 master cylinder is a lot shorter than the ones I've seen on earlier single piston cars. Are there any advantages from using an earlier version (i.e. more fluid capacity, etc.)?

Thanks guys!