I often store my '59 with 292 for weeks or months at a time and I hate the thought of fuel just sitting/evaporating in the 2100 carb.  I do use STA-BIL, but still...  Can I simply add a fuel shut-off valve ahead of the fuel pump and let the engine run itself out of gas?  Can this harm the fuel pump or damage the engine by running lean?  Are there any other good alternatives?