Dimensions of F-781 ver stab attach plate

Morning,

I am hoping someone can share the dimension of the VS attach plate on the HS attachment face for the RV-7. I am installing the doublers for SB14-01-31 on the front spar I am in the middle of re-building and need to ensure I have room for it - hard when you don't have it yet.

Thanks in advance

3 3/4" wide where it attaches to the HS spar.
Hope this helps you.

Exactly what I need- thank-you!