I have read a few threads as i could find on cooling a 6BT in a 715.. it has a alum radiator but no room for the stock fan..what are people using for a electric fan in these .. i have found cam”s in the 3000 range . Doesn’t seem to be enough by what i have read.. im not worried about milage or any of that .i just dont want to over heat it.. I usually go a lot more than i need for peice of mind. I wish a stock fan would fit on it