That cam likes a little squeeze on the compression. When I ran it, I had maybe 9.8 -10.0 compression at best and it ran out the door at low 12's driving it every where and to and from the track. At the time my ride was weighing in at 3500 Lbs.
Put the same stick into a friends 3900 lb car and it went 12.90's with out good tuning.
He was lazy behind the wheel as well.