I believe the mounting surface of our radiator is around 14" W x 26" L. I have been doing a lot of research and looking for electric fans to fit the VX, so far I have found nothing to fit. I read that a general rule of thumb is that the electric fan must have a sealed shroud that covers 85-90% of the radiator surface, and that a puller fan normally runs better then a pusher. The best company seems to be Flex-a-light.