I purchased a new 2007 Crew cab SE 4x4 2 weeks ago. I hated how the truck sat much lower in the front so I researched all the leveling kits here on the forum. I wound up purchasing the NCD kit off of Ebay for $89 delivered.
I found that with my truck most of the the posts / comments here on the forum where incorrect. A simple grinding of the spring bucket would not once again allow the shock to limit the down travel. Once the 2" leveling kit was installed I would have needed to remove the whole lip on the coil bucket and then some. I probably would of had to take off over a 1/2" of material which definetly would have been not acceptable.
I wound up machining the spacer to .750 thick as anything larger than this would make the UCA's contact the spring bucket even with mild grinding. In order to do this I had to disassemble the struts and add longer studs. Now my truck looks good with a slight forward rake and the UCA's will never contact the spring buckets
I think all the company's selling these should let the Customer know that if these are installed their upper control arms are going to be hitting the coil buckets at full droop. If I had to do this over again I most likely would have purchased upper control arms to go with the leveling kit.
Onto the pictures
Here you can see the UCA contacting the spring bucket in 2 places with the 2" lift installed
From the bottom....Here you can see I would of had to take the whole lip off as in order for the shock to limit the downtravel the UCA would of had to sit almost an inch LOWER.
Truck with 2" leveling Kit before Alignment
Truck with 2" leveling Kit after Alignment
Truck with .750 inch spacers.
Mild grinding of the coil bucket which wasn't even remotely close enough
Spacer being machined. I took them down to .750 thick.
Spacer install on Strut Assembly