If you are thinking about converting your truck to an open driveline keep in mind that nearly every one of those conversions puts the axle a bit more forward, this results in the wheels not being centered in the wheel wells.
If you aren't bothered by the aesthetics go this route.
There is only one year axle housing that puts the axle where it should be, a half year actually, it's the 1955 first series.
You will have to weld perches on the top of the axle housing to properly place the axle but it will look correct.
