Fred,
Why? I mean, if it ain't broke, why fix it?
Bravo drives can be set up the way you're talking about because the raw water pump is on the engine, not in the drive. You can get a block off kit for the Bravo drives, but I don't know if one would be available for a drive with the water pump in the lower unit.
Bravos can be set up with redundant intakes, one through the drive, and a 1.25" raw water through-hull. This is the recommended configuration for closed cooled models, and how I set mine up. Maybe you could use a similar configuration.
Dave
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Blue Heron Boat Works
Reinventing the wheel, one spoke at a time.
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