bolt spacing between front and rear swing arms for monoshock skid?

[joesrtx]

Hey all. I want to put a monoshock skid in my rtx and I have to move the rear tunnel brackets. What is the spacing from front hole to rear hole the mono skid requires?

 

[MrSled]

I will be in my shop on Wed eve.. I would be able to get it then.. unless someone else can pull a tape.