So the base 350 now produced a 200-horsepower rating, the LT1 made just 255 horsepower, and the sole big-block, an LS5 454, could only do 270 horsepower.1973 Corvette Horsepower Base 350 now rated at 190 horsepower and a new optional "L-82" 350 made 250 horsepower. The sole 454 was...