Take a look at my posted photos that was taken from underneath the steering box. You can see the shim that I made out of 1 inch wide by 1/8th inch steel stock.

In the photo you can see the shiny steel shim between the black paint of the K member and the steering box.

The post photo is several postings above this one,,,also read the associated text. You can also use Williams washers as Hotchkis had recommended.

If you do not shim you will have toe alignment issues, box will not be on top crnter and shaft will be at an angle into coupler,,,which is the least concern. The angle just illustrates that you likely have a problem.

I post the photo again.