My son and I want to clean up / simplify the engine compartment and entire dash on his '72 complete resto. We want to keep the rear drum system and e-brake, but get rid of the factory brake warning light system on the fire wall and the factory proportioning valve - install an Arizona Z proportioning or another aftermarket one. We're completely removing the dash and existing electrical so we don't have issues with warning lights. Any insight on the above reduction and simplification?