I have a 2007 F150 4X4 and want to install leveling kit. Any suggestions on what brand/type? Also does anyone know of a good place to have it installed in Dallas TX, other than 4wheelparts...?

 

not to be a *** but there is a Search function at top right. endless topics will get all the info you need.

Auto Spring from EBAY.
can do it with basic tools, very simple

 

You can use the search function and get an answer in a couple of minutes or start a new thread and get answers in a couple of minutes.... It seems most people choose to start a new thread which gives me something to do.
"The best" is subjective. It depends on what you are looking for, how much you are willing to spend and how you use the truck. If there was a single answer for what the "best" is, there wouldn't be any other options since no one would buy them.