There are three different jacking points that you can use..
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I prefer to use a jack between the axles under the equalizer link (point #1 in above pix).
I use a low profile 12 ton jack which has a wide base and top, I also add a couple of jackstands while doing this.. This point will raise both wheels fairly evenly but you do need to be careful that you do not force the equalizer to flip one way or the other.
Point #2 is another good go to lift point, you will need some extra cribbing and a jack with more lift than a low profile jack.. This one can get unstable if you do not have enough cribbing and have to extend jack full lift but it can lift both wheels off the ground as long as you have enough jack height to work with.
Point #3 is a good medium compromise between points #1 and #2, you want to place jack under the spring and not the axle tube. depending on style of axle (mine is a drop style) you may need a low profile jack like I do or you may need to place additional jack at point #2 to lift slightly until you can get your jack in place.
Point #3 is where my tire shop lifts, but they have low profile garage jacks with long handles for that reach.
I would not recommend trying to lift both wheels from the front axle or in front of the front axle as that can take enough weight off of the tongue to lift it off the ground.
In all cases, use jack stands for those oops moments and try to do this on as level of ground you can get..