8-pack, I know you read that thread of mine. I think what I'm going to do is buy the XHD from Mancini (which are apparently the same as the MP ones) and run them on my car. I will likely hang onto my superstocks though in case I decide to go racing. I tend to switch stuff up a lot (I had 5 different sets of wheels and tires on my GT in 3 years and plan on having 15 inch ralleys, the 17 torque thrust 2's and a set of drag type wheels and tires for the cuda). Did you read the last reply in that last thread of mine, Art at Mancini said they would fit but he just wasn't sure how they would hold up. I think he is just covering himself there because he can't guarantee an application that isn't in his partsbook. I tend to go with the guys on here who have run the a-body XHD's with no problems, they are the ones that have actually tried the stuff. Just my 2 cents.