You didn't say if your over heating problem occurs sitting at a light or on the high way?? When you moved the radiator towards the rear you opened up a large gap so that air can flow around (instead of through) the radiator (going down the road). I had to move my radiator aft as well but I blocked off all the open spaces around the perimeter of the radiator so that air is forced "through" the radiator instead of around it. Fans lose a lot of efficiency when you use them as pushers. They get the most CFMs as pullers.
Treblig
