Help with master cylinder install

[Curly68]

Hoping for some help I’m in the middle of installing new MC. Power drums on 68 charger.
My brakes have always been a low pedal with very little travel. I noticed that the push rod out of the booster that pushes the MC piston only travels about 3/16”. Is that normal? Can I lengthen the booster push rod?

 

[oldkimmer]

Post a pic or two.

 

[Dipstick]

Crawl under the dash and measure the travel of the push rod where it attaches to the pedal from full up to the end of its travel to the floor. Same 3/16" or...?

 

[Curly68]

Post a pic or two.

Thanks for trying to help. I installed it as is but broke my last bleeder valve off. I'll report back

 

[Curly68]

Crawl under the dash and measure the travel of the push rod where it attaches to the pedal from full up to the end of its travel to the floor. Same 3/16" or...?

OK, I'll do that and get back