I run the Newman AB07. Timed as standard as per MSD's recommendations on quaife steel pulleys with standard exh cam. It is very very mild so runs exactly as a standard engine. I wanted my engine to retain its sewing machine smooth idle and the AB07 keeps that and helps it breath better mid / top end.
I cant back it up with any technical data but my motor goes well and made 362 @ 21psi on msd rollers on a little tt t35.55 with other supporting mods.

Good cam in my experience but really depends what you want out of it.
i went for it after reading someone else's good experience with it. I think it was steve with the yb xr4i who had good results years ago.