[Lynn Eades]

Andrew,I have a few questions for you to think about;
Hopefully you flicked the inner seals out of your bearings.
And.....With a bronze bush in your gearbox, make sure you don't use an E.P oil.
E.P. oils are inclined to eat bronze. (It is to do with the sulphur content, I think)

The gearbox probably only takes an ordinary 80 grade anyhow, so maybe no problem.

Phil could probably tell you (off the top of his head)what your bearing is and tell you where to get one, if you can't buy one here.
Personally, I would find a bearing unless the condition of the running surfaces precludes its use. (have you turned the main shaft down?)

The last thing, Is how do you stop the excessive mainshaft end float without the slinger in place?