Master Cylinder Pushrod Needed asap...Question - Photo Attached

I am swapping my '67 manual master cylinder for a '73-up power MC but keeping manual brakes.
Here's a photo of my old MC and the pushrod that was in it, along with the newer MC I will be installing.
It's abvious that the push rod assembly attaches differently. Is there a way to use the old pushrod or do I need a newer one from '73-up donar car with manual brakes?

Any help would be great! I would gladly pay for prioty shipping to get the correct pushrod here asap, new or used.

I am also installing an adjustable prop valve in the real line.

Ultimate plan is front discs with the original rear drums and manual brakes, using the '73-up MC for a power brakes car (smaller 15/16"bore).

Thanks!

Doug