73 Duster Brake Booster

Ok so I am confused by Dr Diffs bendix style boosters. I added it to the cart but you also have to add a Hemi Style Under Hood Linkage Kit which costs $225. You also have the option of adding a master cylinder or not. My question: Is this linkage kit needed to swap to this style of booster for my Duster. I know I need an adapter to convert the booster from 2 bolt M/C to 4 Bolt M/C. Clear as mud