Hi Ross

The lower bearing is 35 x 62 x 18 and the top bearing is 28 x 52 x 12. I've left enough room to double the top bearing should i need too. It's all about making things fit, it does not work out then i shall build a complete new spindle and housing. The locknut should be fine as used that arrangement before on another project. It's all heavy duty so will have to see how it works out. Just made a new adjustable burner for the furnace, so will get some Ali blanks cast at some point this week to make the pulleys. I can then start getting the motor mounted etc.

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