Brake Pedal Return

('71 Duster/Auto/Slant-Six/All Factory-Stock/25K)

I had to do an emergency 4-wheel lock-up panic stop,
from 70mph to narrowly avoid hitting a deer. I actually heard
a sound like something cracking from the underdash area
of the brake pedal assembly when I literally stood on the brakes.

Since then, the brake pedal does not fully return to
its top-most position, and leaves the brake lights on.

It does not engage the brakes, just the lights.

You must place the top of your shoe underneath
the back of the pedal after each use to manually
push the pedal back up, in order to get the
brake lights off.

What parts do I need to correct this?

(My local MOPAR parts counter staff
just go "duhhhhhhhhhh" when I've
tried to order any thing for the Duster
without a part number to give them.)

Thanks for your expertise & help on this!