i forgot where i read it but its supposed to be like a 2 1/2 inch drop on the r/t...but yeah thats what im going for..it looks really good on your truck so ill be happy. i like 275s in the back so thats probably all i can go..haha something about a fat back tire just appeals to me =)

 

wow those are some flat leaf springs! lol. Youll be needing those caltrac bars for sure lol.

also, another good swap is a shackle move. move it up a bit you can gain one more inch or even a half whatever you want. Im sure you can modify the frame to fit new bolts instead of rivets and just re drill everything in new positions if you have a welder fill the old holes in.