Hi ,I just purchaced a B-Cool elect. fan #75068 (3140cfm) and after trying to mount it up I see in the instructions, that it needs a min of 1" clearance off the rad.The hub just touches the rad. Do any of you guys have any expieriance with this particular fan,and how did you get the proper clearance? BTW I do run a Meizeire 55gph elect. water pump and it comes close to that.............. Thanx for any help