I know what you mean about space but I agree with others about the line. I would look at a remote filter set up and run the lines along the side of the pan if you can. I'm not sure what you're frame and engine look like from the bottom but I would think there has to be a way to do it.
Also my temps don't get as high as yours. What temp do you have the fans set to?
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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