You guys know about the "trick" to turn a crossflow into a 3X crossflow, right? Radiator shops have been doing it for the roundy-round guys for years. Works really well if you have cooling problems.
Basically they put 1 block off in each tank. This routes the coolant through the radiator THREE times before it returns to the block.
Didn't mean to hijack the thread, but this seemed like as good a place as any to put it.