I run 2" in my 93 Xlt. With 8 tooth drivers and an edge skid. And it barely clears. With 9 tooth drivers I would agree that 1.5" would be max. And I also have to take off my chaincase to pull the drivers, complete pain, but I run 4 drivers instead of 2 extroverts.
But I wanted to chime in so you know 2" is possible, just depends how far you wanna go.
Sorry if this doesn't make sense, typing on my phone is rough