Are you sure about that measurement? In '57 there was a running on the 3204 (123 1/4" wheelbase pickup) from the 7 1/2' box to an 8' box. this change was made around March of '57, the same time that the factory 4x4 was introduced. From your description, I would say that it's a late '57. I would suggest that along with a shop manual, you get an assembly manual and a catalog from Mar-K. It sounds like you've got yourself a nice one, ecpecially with the v-8 and hydro. You'll have to get some pix in the gallery when you get a chance, cuz we all want to see it.
