Anyone care to share their experience with these? I was thinking of finally installing the one I have. I don't expect to see a huge difference in performance, but your input is always appreciated. What plugs did you run and at what gap? Show me some pics of mounting locations too. Bob. P.S. I would gladly trade the MSD 6AL (NIB, never even opened), a NIB(also never opened) Comp Cams cam & lifter set (# 122102) and a set of NIB Comp Cams roller Rockers (#141216) for the 89-91 conversion parts.