[spdbrake]

Yup I have one and drilled the cap and did Phase the rotor. Still sucked even though I had it set just to left edge of the post at idle and roughly centered on the post at all-in though.
I was getting 18-24deg, 850-960 idle, AFR 13-15 or so (rough numbers here) like it was arguing with itself. So I decided to remove a job from its to-do list.
Once I unlocked the dizzy I used the Blue springs and Green bushing this time and Phased the rotor again. Then installed the the awesome new MSD black dizzy cap (Prob good for 50 more HP like a red Type R emblem).
Pretty stable now, and no hunting.