[Cliff Beer]

Doug, if you're utilizing a large displacement motor (5.0 ltr+) that dimension radiator should work OK (assuming the core thickness is reasonably thick) provided you get sufficient flow past it. With that much rake and limited frontal exposure I suspect you're going to need as big of an electric cooling fan as you can get. Spal makes a variety of dimensions and outputs, and they're highly regarded, but I'd shop around to find the biggest output. In any case, it's likely going to be marginal at best. You could try adding one or even two oil coolers in well placed locations (wheel wells are common) to help with the thermal issues - these work really well if there is a way to include oil squirters (focused on the bottom side of the piston crown). In the end you'll probably have to try a few different things to manage the heat.