Brake Booster

[A83]

Trying to find the right Brake Booster for my 1983 - anyone know which one was used? The garage doing the work is trying to make sure it’s the right one. 

Thanks 

A83 

[silverstude]

Cardone 5473105 / AMC (big block)Javelin w/ disk brakes, but Rockauto says out of stock / then this came up with no number reference

https://shop.advanceautoparts.com/p/wearever-unloaded-vacuum-power-brake-booster-domestic-54-73105/18690235-p?c3ch=PLA&c3nid=18690235-P&adtype=pla_with_promotion&ds_rl=1269695&ds_rl=1269728&ds_rl=1274535&gclid=CjwKCAjw_MnmBRAoEiwAPRRWW1lxwCrfnELWr8D8g6sQjPbAr8YlNsQoL2jM6c76M9oP5gV2kkvjtRoCov4QAvD_BwE&gclsrc=aw.ds

Don't know if it's the same but look like it

You have to use 1/2" spacers on the firewall mounts