Originally Posted by
bluebellied
it is for a murray image from the late 80s that i am thinking about converting to a single speed.
Do you have the original rear wheel? If so,
If it is a freewheel, the hub can be-respaced and the rim re-dished to get the right chainline.
If it's a freehub/cassette system, you can run a single cog with appropriate spacers on either side to get the right chainline.