I had the exact same problems with my RK-sport headers (same as ASM). The previous post is correct, you need new motor mounts. Don't give up on the ASMs, just replace the motor mounts (before you install the headers) and you should be just fine. My set up leaves aboyt 1/8 inch between the primary and the drive shaft, and the same between the crossmember and primary in the passenger side. keep the ASMs, much better quality than the BBKs, plus the ASMs are 1.75" and the BBKs are only 1.5".
Last edited by 93_z-28; Mar 3, 2006 at 10:37 AM.