Get a electric pusher fan. They make those slim line electric fans, that push some serious air. We've seen some guys also move the front core support forward a couple of inches. Flex fans are
![Pokinit :pokinit:](https://board.marlincrawler.com/Smileys/marlin/pokinit.gif)
! All they do is flatten out at higher rpm's and don't pull needed air through the radiator. There are many guys that are running a SBC and running a thick radiator and a electric fan with zero problems.
Which water pump do ya have? There are two for SBC's. They make a short and long water pumps.