Modification of K-member idler arm mount advice

Today I made a jig similar to what moparmatt did, instead of having a tube I welded on a bolt to locate the centerline and had a metal plate to locate the top of the idler mount.

I was very surprised by the result, the whole mount sits much higher than on the k member it came from. The tabs that both go to the k member are both higher than they were old the old member. I made note of the orientation of the mount i.e it should not be spun clockwise or anticlockwise from where it is now.

If I was making an idler mount from scratch I would not have questioned it but there is a big difference visible here.

The jig is not made of that thick steel but it is not flexing from where it should be, in other words I don't think the jig is lying.

Any ideas? Were the tolerances from factory this bad??