[hemi43]

That sounds about right CJM.
After re-arching mine it dropped it down about 1 1/2", to around 39 1/2".
For me, 41" was just a tad too high.
Amazing what even just a 1/2" makes.

If you plan on levelling the rear, you may want to consider what I did;
I put the locator pin on the blocks 1/2" further rearward to locate the center of the rear axle in the wheel arch a bit better. For some reason, GM put the axle a bit too far forward IMHO. It's only a slight change, but it's little things like this that add up to make a huge difference. Using rear spacers on the rear wheels also helped the way the truck looked going down the road.
These trucks look like they "crab walk" from behind because the front track is about 4" wider than the rear. Spacers got rid of this. In fact, one block has a pin 1/2" further back and the other 5/8". My truck was a bit out of square from the factory and this lined everything up.