Fer sure. I’m just not sure if an 8” static drop is drivable. Regardless of frame/bed modifications. I don’t know that I’ve seen an 8” rear drop on a gmt400.
I hate double work and I hate waisting money. If I do the flip kit in the back, I’ve got the stock shackles to out back in. But then I’ll have to figure out if I can put bags in the 3” drop lower control arms I’ve got in the front.
I don’t see why it wouldn’t work. There’s plenty of examples of bags on stock arms with 2” drop spindles.
I just don’t know. And I’m not in an area that has an air suspension community, or lowered suspension for that matter so it’s not like I could buy everything, try it then resell it if it doesn’t work.