Anybody have any idea what or where rear axle center line would be on a 1955 series one 1/2 ton pickup? I understand this was a weird model year because they used 2 different frames, outside frame spring mounts and under frame spring shackle hookups. My truck I believe was under frame, no mounts on side of frame. I am looking to install a decent rear that would work with a 5.3 LS.