Mark... good point. In my "vision", the extra 5 inches would contain the upper tank of a downflow-style radiator, so all of this would be above the core elements of the radiator. Nevertheless... the more airflow the better, even for the return tank of the radiator. I am planning to have the radiator manufacturer provide the shroud and the electric fans. Take a look at minutes 9:53 to 9:58 (yes, around 5 seconds) of this video: I was looking on the web for other people who put an LS3 into one of our AD trucks and I found this. It appears that they used 2 fans, positioned over towards the drive side, and closed in by the shroud. Over towards the passenger side, it appears to me that there are 3 rectangular holes cut into the shroud, probably to increase air flow outside of what is controlled by the fans which again, are off-center. For sure, it is a tight fit to make sure all of this fits within the distance between the back of the radiator frame and the front face of the engine block. As for my build, I THINK the serpentine system arrives today from VintageAir. When I mock that up, I will get a better idea of how to fit radiator, shroud and electric fans into the space allotted. At that point, I will start talking to radiator builders to design a radiator, shroud and fan combo that fits AND would cool the LS3 AND make sure that the air condenser has the required airflow as well... the condenser would sit in front of the radiator (somehow). I gotta tell you how comforting it is to have all of you to discuss these ideas with... for a relatively non-social person, the value you guys bring tends to drag me out of my cocoon.
