Just my 2 cents but the nhra hand book might help I know it gives all the rules and classifications for altereds and such and whats required depending on how fast you want to go. I had an old chasis and usually a good chasis shop especially one that can cerify chassis is probly the best place to ask what should be where. Hope this helps dunno this ones is for the ihra http://www.ihra.com/tech/revisions.html