Hey bobcatnn -- welcome to the Hotrodders Bulletin Board
There is an article in the Hotrodders Knowledge Base entitled "Ford Rear End Information" that might be helpful to you. To access it, first visit the main page of the Hotrodders Knowledge Base <a href="http://hotrodders.com/kb/" target="_blank">here</a>, then, click on "Transmission-Rearend", then click on "Articles". You should see it at #11 in the "Rearend" section. Hope that helps.
Also, if you haven't yet had a chance to look over our board guidelines, you can check 'em out at this link: <a href="http://hotrodders.com/guidelines" target="_blank">http://hotrodders.com/guidelines</a>.