Generally a 6" width can be up to 35mm while 7" can be up to 25mm to clear the strut housings. So 38-10=28mm would be close and I'm sure would depend on the amount of contact patch and size of the tires as well as your camber settings.
I'd be willing to bet they would work fine.if you used 15mm spacers I would guarantee perfect fitment.
If you go with spacers, please remember to use longer wheel bolts! :rolleyes:
I've had good experience with Vorshlag. Their prices are pretty good for wheel stud kits too. http://www.vorshlag.com/wheelstuds.php