Ok men, I am guessing at the 3", but, I know about the dowl pin hole, My problem is, the leaf springs are so long, and the end of the springs are at the end of the frame ,can not cut and move them back any more, so, like you say, I would need to get the proper measurement and see about putting an extension on the saddles that are on the axle, and go from there, Many thanks, and by the way, I am looking for body parts for this truck, like the original hood with all the emblems, original bench seat complete, and a few more parts, if anyone might can help with with this, again, Thanks