I am not trying to steel your thunder, but here is what I did to remove those heavy brackets. I installed a pulley used to apply tension to the timing belt. You can buy them through 3SX.com. It has an offset hole which allows you to rotate the pulley and apply tension on the belt. The belt still barley fits when the idler pulley bolt is loosened, but once it is turned down, you can apply the correct amount on tension on the belt.
I don't remember what mounted to the hole used to fasten the pulley but it was obviously free. The only thing you have to do is add washers to move the pulley away from the engine block and once tightened you have to make sure the pulley is straight.
