1 ton longhorn rear

[va72longhorn]

After a 3 year hiatus, I finally found a good body and paint man to finish what little bodywork I had and then spread some paint over my '72 super cheyene 1 ton Longhorn. Now the problem is I have time to think. I was looking through the threads the other day and I notice a few longhorns that some of you have put duals up under. I dont think this was a factory option, was it? What's the secret? Wider wells? Do I need to change the front rotors? I'm running what I thought was a 4:70 something rear, but Im thinking its a 4:56 now after reading what you guys are saying. Either way, I'd like to change it to a 4:10 if not a 3:73 or so. The sound of almost 3000 rpms in between fuel stops is killing me, not to mention my original 402 BB .I still plan on hauling a 2 horse gooseneck trailer with it occasionally, but I think the 402 coupled with either of them will be more than enough. Any input or words of wisdom?