I have a 65 FJ40 with disc brakes all around and a Wilwood master cylinder. This rig has no brake booster. Looking to add a brake booster / hydroboost even if I have to change the master. Firewall has 3 bolt pattern and yes has the rib on the engine bay side. Not opposed to a little fabrication if that's what it takes. Brakes work good, just takes a lot of effort. Thanks in advance if you have recommendations... Yes that's a small block.