auto cross

I believe a small block aluminum head should be worth 25 pounds per side so 50 pounds total. I was under the impression that a big block engine complete weighed at least 100 pounds more than a small block and I would imagine the weight savings are similar on a big block. Maybe the 50 to 100 pounds isn’t that big a deal when the car is really set up correctly as long as the shocks and springs can handle it