I got a set for my 71 R/T Challenger and am very happy with the look and fit.
Got mine, (Box said Voxx Old School but the center caps have B&G on them), from Tires Direct on sale around Christmas...
4 15x8 wheels with 4.5" back spacing with center caps and lug nuts for $280 shipped.
Here's a post where somebody used the larger size Old School wheels....
http://www.cuda-challenger.com/cc/index.php?topic=79573.msg800520#msg800520