Brake booster support brackets

When I put a power booster on my 65 Dart, I installed brackets from a 74 slant, but left off the lower support, installing just the side support. I am using an aluminum MC, so lighter. New booster setups on ebay don't have the lower support.
I am restoring my A body mopar booster and using a cordoba cast iron master cylinder, and large cordoba disc brakes and calipers on the front.