Nice set up Jay, looks like you could turn out block girdles no problem. There isn't a problem making a strong girdle IMO, the hard part is making one that doesn't need a ton of expensive machine work to align it, or custom fab to integrate with the timing cover/oil pan.
A cast/billet clamshell type like found on the new Thor 4 pot engine, or maybe a budget type similar to the main caps arrangement on the Mitsubishi Evo engines might work. The other problem is cost effectiveness, the fully fitted girdle assembly has to cost less than a quarter of what a new aftermarket block costs, or it doesn't make economic sense. Again, just JMO.
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