$300 a good price for 325/50/15 M/T drag radials?

so i would need to move them into the frame rail huh? what size tire could i run with the offset shackle kit? i was looking at a guy who was running this size tire and he moved his springs in an inch... maybe he just didn't tell the full story.
http://www.forabodiesonly.com/mopar/showpost.php?p=277795&postcount=79