Hello everyone! This may be a bit long but please stick it through! I have tried to research until my eyes and fingers bled and have found small bits of information but nothing concrete! Here is my story, I’m doing a project and am going to use Ford Dana front and rear axles. What I need is information and or confirmation about the axles I wish to use. My required specifications are as follows: needs to have a wheel mount surface to wheel wheel mount surface measurement of between 75-80”, disc brakes, full float, and lastly needs to be strong. My front has already been selected. I’m using a Dana super 60 from a 05+ F450. The rear is where I hit a roadblock. The obvious choice is a Dana 80 but apparently they come in like a thousand different variations! I have read in two locations that some E450’s had a rear Dana 80 that was 77-80” wms to wms but cannot confirm that, I have spoken with 5 wrecking yards and had them take measurements from different Dana 80’s and have revived measurements from 71.5-74.5”. So to the point. Was there a Dana 80 that was put in any Ford vehicle that has a wms to wms measurement of 77ish inches? If yes what did they come in? And what years? I have looked at Ford ambulances, busses, and box vans and can’t find one. Any info would help keep the rest of the hair on my head! Thanks everyone I really look forward to your replies