How much grip length do you currently have?
ARP makes a set of very high quality long studs that can be trimmed to length as necessary. The standard OEM studs appear to have a .618 knurled area with a length of 1 13/16".
http://www.dormanproducts.com/applic...&cn=WHEEL+STUD
Click on the picture of the individual stud once the site opens for specifics on the individual studs.