I am certainly no expert in this area, but I believed that you are correct. Based on my own research it is (or was) the Honda J35A3. However, I understand
Ayuh,..... For a reman long block,.... Many have had good luck dealin' with Rapido of Florida, 'n Michigan Motors, of Michigan,....
Ayuh,.... What vintage is the hull, 'n transom assembly,..??
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As much help as I have received on this forum, I'm glad I was able to help someone in return. You're very welcome.