How long is it?.....

.....  from the lip of the slave cylinder to say the center of the clevis 
pin hole on the push rod.
        Specifically on a 67 Sprite, though any 1275 w/ ribcase should do.
        Trying to ascertain if the slave is maxed and the mechanics are bad, or 
if 
the hydraulics ain't makin' it.
        Thanks.
        Peter C