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k20a2/ k20a3 blocks Is there any big dif. among both of these. I am conversing just the blocks. As in would a K20a2 block certainly be a better option in sleeving in excess of the A3? The A3 are so inexpensive to return by so I just needed to know.So magnificent! this was my Blue Funco in the images. I built it though completing a long-term chassis