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getting the (LT4 Heads) and putting them on my LT1 now i already know theres a hotcam kit for the LT1 but i just wanna know how much (horsepower & torque) will i get from installing just the LT4 Heads onto my LT1 alone would i atleast lay down 305rwhp (rear wheel horsepower) at the wheels or even more horsepower and even more torque right?