if you do that you better get 13 inch wide rear wheels like the viper

 

i have been after a set of viper rims for SO LONG i just cant find a reasonably priced pair. (under $1,000)

 

http://www.wheelcollision.com/dodge016.htm

that place sells wheels and they seem to be cheap. You could get a pair of the older style viper wheels for the rear for under 600$ Ive never dealt with them, but i found that site online one time when I was looking for R/T wheels.