Mine is 5/8 static, fuel tank is fine at that height unless you have short tires. Any lower and the tank would need raised. Mine is raised about 1.5” but that was for subframe clearance, not ground clearance. I actually had it 5/10 for a day or two. Still rode great but I wasn’t happy with cv angles and didn’t have a way to lower the front to match the rear at the time.I don’t know that I’ve seen an 8” rear drop on a gmt400.