Technical stock model a rear end self energizing brakes

What is the most common way to put self energizing brakes on a stock model a rear ?

 

'41 / '48 Lincoln brakes , with 'Ford drums .

 

Nowadays it's to order all the parts from Boling Brothers.

 

What brakes do you have on the front?

 

I had a rhd model a from I believe Argentina,it had juice brakes on it.I believe they made repop's of this car for many years.

 

thank you guys

 

39 plates with buick drums