68 B'Cuda Coupe Rear Springs and Shackles

Hey you A-body Barracuda fans - I'm restoring a 68 Barracuda formula S 340 and am replacing the rear leaf springs. I want to put some 8-inch rims on the back with 15 inch tires. Was wondering what kind of springs and shackles I should get to give it that modest lift in the back to clear the wheel openings. Also on the the rims...what backspacing do you recommend with springs and shocks in their original place. Any suggestions? Pics of your cars showing your set up would be most welcome.

Eric