I installed one of these CPP booster setups on my 49 3600 and share your frustration.
Judging by your picture, it looks like it clears the emergency brake rod, just barely. Did you cut an access in the floor for the master?
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum