Hardbody Measurement Help

I have a Nissan Hardbody the i want to put a 4 Link on.  I am currently deployed and want to order the parts but not sure how long the bars need to be can someone help my out it is a regular cab short bed if that helps anyone.

Contact Suicide Doors www.suicidedoors.com they have universal 4 links that will work with any mini truck and if you want specifics they can help you with that also.