The kit I got was universal and came with spacers for the brackets when one side would be on a ridge and the other in a valley, which leveled it up nicely. I mounted the brackets about an inch behind the factory holes since they didn't match up anyways...but that would result in you cutting on your carpet.
I eventually picked up a rug from Walmart for $19 that had the same kind of loop carpet that comes in the kits and cut it to fit around the brackets. I just kinda rushed through it and it still came out looking decent for the cost IMO.
Here's a pic of the brackets before I straightened that one out
Before I got the carpet pulled back and attached.
Seats with no carpet.
Seats with carpet.
Hope this helps a bit.