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Craig Fraser ran a 25 pitch prop similar to these at Dunnville on his 49 big foot Critchfield. 24 or 25 pitch seems to be a good race prop on that combo. These would likely work well on a VooDoo big foot as well.
You can normally re pitch down 2 inches, so it would be possible to make these work on a T850. Alter the pitch and reduce the diameter. Most SST 60 props will wear out on a SST 60 boat. Re worked these are excellent for T boats.