'Grabby' brakes

Is the replacement master cylinder the same bore diameter as the '73 Swinger you started off with? Smaller diameter, easier to push, easier to lock 'em up.
Not sure I can answer this one. It was spec'd as a direct replacement, but I wouldn't put any money on a mass-reman'd part being application correct.. Can this be checked by -part#? Or by measuring the 'pushrod end' without disassebling the MC?