March underdrive or high flow?

[gunnerdog 10]

Well what do you guys think?

[70vert 17]

I would go with high flow if you are upgrading your engine and radiator, or have an upgraded engine but stock radiator. If you've upgraded your radiator but not your engine, probably don't need higher flow and ease off the engine.

 

Got any more info so we can give a better recommendation? I plan on going high flow to cool off the 408 stroker I plan to put in.