Cragar will only make the soft 8's with 4" backspace, theres a few other brands out there that make the same exact wheel with different offset. I got mine from 4 wheel parts. They're rockrawler series 97 made by pro comp and they have the ideal 3.75" backspace.
On the other hand the kid who lives beside me has gotten crager to build whatever wheel u want to whatever specs you want and it's not too expensive if I recall. It was nice for him because his drag car is far from stock anymore. I don't think it's necessary for u go to that route if your just goin for looks.