315/60/15 Mickey Thompson Drag radial on a 94 Cobra???

OK guys I ordered a set of 315/60/15 MT drag radials for the rear of my Cobra. Im now having second guesses if they will fit. I know I will have to pull the quad or at least flip it and beat on the inner fender some but what about fitting on a stock rim as far a spacing. I also have Eibach sportline springs but Im going with a set of 4cly front and rear springs with 90/10s and 50/50s but the shocks and struts will be at a later time but the springs will be changed soon. shouil I keep the sportlines and ditch the 4cly springs and wait for drag srings or do you think the 315/60/15 will go OK with the 4cly. The 315/60/15 is 29.xx inches tall
 
Height wise I dont know. I have 315/35's on 17" rims and they fit fine. I didnt need to flip my quads, but i didnt need to do some innerfender beating. Im lowered around 2 inches, and I would assume with a taller tire like you are getting you will have to do a little more than i did. But I didnt have to do much at all.