lenweiler said

Just a side shot of the extra material and the frost plugs. Since this engine will sport outside water lines, the centre frost plug/s will be removed and special fittings (courtesy SD) will be pressed in to allow AN fittings and braided lines. Outside cooling is an effective way to cool the rear cylinders that have a tendancy to run hotter than the front since the water rarely gets a chance to circulate rear-ward. And this is, afterall, an aluminum-headed, high compression engine. So cooling will want to be at an optimum.

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