Both are pathetic in factory form. That's not necessarily the engine itself but the restrictions that were placed on them for normal people that don't care about max performance. Factory hydraulic cams are the antithesis of performance.
Yes, very common in the C-bodies to find a 4500 lbs car with 2.76 gears and a 15" tire. Single exhaust, tight converter, and really never given a chance. But when given a "semi" chance to perform, they ran right with the crowd of that era.