That's the biggest size they have in the 420s for an 18" wheel but I'm open for other ideas on sizes and tires that will hook good.
Don't be scared to run a Nitto.. My 2wd 06 ran 11.1 at 131 on a pair of normal 20'' street tire nittos (not drag radial) back in 06/07. Getting a 2wd street tire to hook is an irritating art..
What size nitto?