I'd suggest you read
500 Magnum Nuts FAQ "sticky" at the top of the "1980 to Present" section of this website...
He has lots of of important info specific to the 500, as well as other info every member here should read. Scroll down his whole page. I believe a section addresses your specific info request....
He has been helpful to me in the past and really knows his stuff. If you have questions not answered in his sticky you may try an e-mail directly to him....