Originally Posted by
BCRider
I don't think that a BB spacer is what you need in this case.
If you read it again, ultraman was suggesting using a BB spacer (apparently free at his local bike shop, $3/ea at mine) behind the freewheel to space it out further. While that's usually fine for 1-2mm, my calibrated eyeball is telling me it's 1cm or better and requires a wheel redish as you suggested.
Better than guessing or even using a straightedge, you can measure the
chainline and compare it with the rear.