The only thing that I can tell you is to watch the temp when driving, if the temp go's up then you'll have to go another route. The nice thing here is the fact that you have aluminum heads which they tend to run cooler any way. You may want to run a temp sensor in the outlet side of the water flow in the line that returns to the radiator. This will give a good average of what the heads are running for temp.. Being that the heads are the only thing having water in them this is why I say to have a high volume water pump, because the heat that will be transferred will be intense and then use some synthectic coolant like water wetter, this will help in 15-20* cooler running engine. Let us know how it works out.
BJR Racing