Find a good used engine of the same model and plug it in. As long as the ring seal is better than what you have right now, you'll be happy. And don't worry about bottom end strength unless you are going to be racing the thing.
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Volvo WIA42 VED-12 / 335 hp / 1300 ft/lbs / 9 mpg
Big n' Boxy, Never met a Hill it Didn't Like
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