I have a 1948 Chevy Fleetline Aerosedan, that is all original. I read somewhere about a rear end swap, where you use the rear end out of a 1963-69 Chevy pickup. That way you can keep the 6 lug wheels but get a 12 bolt rear. I'm looking into it but can't find where I read about it before. From what I have researched online, the 1948 rear is about 60" wheel mounting surface-to-wheel mounting surface and the 63-69 Chevy truck rear is 60.5". I haven't been able to measure mine yet. My car is still in storage and we just had snow last week. I found a 1965-1966 rear and it looks to be more like 62". Has anyone done this swap or did I get things all wrong? Does anyone have a better suggestion to keep the original 6 lug wheels? Thanks in advance for any assistance.