The BW ST-10 may be "crude" by modern standards, but if you are running modern lubricants, and have the shifter adjusted and tight, they are a good shifting, relatively quiet and durable trans. With my 3.23 diff ratio and original Goodyear GR70-15 tires, the cruising RPM is not horrid.
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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey
1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles
2017 Sierra SLT 1500 Z71 4X4 
2019 Canyon SLT Crew 4X4 
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