4 link question

I have searched to page 15 in the suspension topic with no luck. When setting up a 4 link you want the ic to be around the grill area to control anti-squat. What about finding the center of gravity without weighing the front and rear of the truck. And what do you use to visually see the ic on a truck still assembled(cab,engine). My vehicle is an 81 courier short w/b. I just finished baggin the front and now I would like to drag this bitch!

This may help.

I have read alot of links to other sites. I just bought chassis engineering by Herb Adams which is a big help. Also purchased How to build a hot rod chassis by Tex Smith. I have never done this b4 but I have great fab abilities and dont like doing things twice. I figured all opinions and conversations about this would clear and questions. Thanx for the link.