| but for the money I would expect: 1) to work with a stock water pump. It shouldn't be too hard to machine the central water galley and then tie into it through the huge holes created for the cylinder's water jackets (assuming wet sleeves). 2) Larger than stock, common SAE threaded main cap fasteners... 1/2" if sticking with two-bolt mains or 7/16" if four-bolt mains. Also, would like to know the main cap material. Steel would be nice but then I'd like to know the steps taken to deal with dissimilar metals expansion rates etc. In my opinion a 90+mm bore would be limited by the water jacket core holes in the heads and the shortage of gasket surface area from a larger bore. I think a 90+mm bore would need a redesigned head with moved core holes to be reliable, especially since this would be boosted.
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