I'm turning my 1989 Buick Le Sabre Estate Wagon Boxie into a kick ass tow rig. (dragging a 3800 LB travel trailer) First order of business is to bag, double shock and sway bar the rear. I'm not having any luck scoring a kit from any of the big players in the bag business. What I need is a bit of guidance from somebody that has bagged a 'Boxie and worked out the hard bits. I need to figure out the length of the hats and total extended and compressed length of the bag and hat combination. (or just the method, I've got math and layout skills, lol) I have top and bottom plates, 2600 LB. double convoluted bags and a bunch of scrap angle, plate Tube and pipe, in hand. Anybody have time to help an old fart get his cool on? Thanks, Paul