I was led to belive that a B1 drive (1999) can run in either direction. My drive has 200 hr. turning RH ed rotation. Do the gears like one direction for as long as they live?.

I was told that in left hand rotation the gears push against the top cap.I ran mine with a left hand prop for years and then swapped to a right hand. I changed out my shifter cables and prop and still going!

makes no diference which way you run a b1

SORRY, but yes it does.
Thats wy IMCO actually makes the top onthe left hand ones stronger.

I u run them on a twin just switch them from one year to the other,,but on a single u whant to run them RH because otherwise the top will wear out.

A Bravo 1 is designed to spin either way. Like was said, running it LH will put more pressure on the top cap. I have never heard of IMCO using different towers for LH drives.