fitting bearings to a shaft advice

[m_c]

Thinking back I think he said "5 thou". Ok, if we assume its 5 thousands with bearing expansion and freezing the shaft will that not give the spacing to get them on?

Not likely.
Even if you did manage to get it on, it's highly likely the bearing will seize due to the pressure expanding the inner race. I don't even think an increased clearance bearing would even be able to handle that much expansion.