I don't believe there were any hull changes on any of the Mako/Seacraft boats. I don't know about the weight on that transom but I have seen quite a few older SeaVee and Contender boats repowered (twins and trips) with newer 4 strokes and a lot of them show signs of cracking on the integrated bracket due to the weight. I see a 32 from time to time repowered with F200s and they supposedly love that set-up..
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