I'm looking for a MSD Box so that I can retard my timing when I want to run the nitrous and when I don't I can drive around with normal timing. Any recommendations? I was riding around at like 8-10 degrees last summer and the car felt sluggish without nitrous and I'm sick of it. I found the MSD Digital-6 Plus Ignition Control with one stage retard and other features and was wondering if anyone had any experience with it or would reccommend something else? Thanks.