First off, I want to state my dad has been working on GM cars since he hit puberty. I trust his experience and knowledge. It's never failed me before. Now, I know GM didn't allow A/C as an option on solid lifter cars because of vacuum concerns. My dad says power brakes probably weren't available either for the same reason: it doesn't generate enough vacuum to support them. However, the options list on CRG doesn't seem to agree with that, as it doesn't say it's N/A on L78 optioned cars. I have an L78 67 about to be restored to its original glory (and I really do mean original). Can anyone clear this up? Were power brakes an option on solid lifter, specifically 396/375hp, cars?