I have done this method of stabilizing a block for many years 1/2 full. I cannot say I recommend this on the street, as I have never even attempted to use a motor filled 1/2 way with block filler on the street. As previously pointed out it has always been used in drag racing where stabilization and consistency was always the concern ... havent given much thought to why or how this would be applied to a street application.
Ron
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