Yeah that turbo supercharging is a good suggestion. The intake and exhaust are on the same side making the plumbing easier.No extra drive belts making a long engine longer. Perhaps the parts of a Buick Grand National will adapt.Those Buicks made large HP.I think a non supercharged 292 can give yield 250 hp, on the street with out becoming too lumpy.That story on the turbo 292 is interesting.A famous east coast drag racer has been running 292's for years, sometimes turbo charged.His cars are dedicated dragracers .He has a hard times getting those low ET's. Maybe he is a lousy racer or some one else is stretching the truth.