Just to let you know, If I had to do it all over again as far as cams are concerned I would go with Comp Cams 127500 Grind, largest cams for stock heads, they are high load springs, cam phasers and spring retainers required cams, and I've seen 37 to 45 hp increase. Lots of S197 running low 12s and high 11s with those cams with bolt ons and stock heads. With 127500 cams you will not regret it trust me. Comp cams also told that with the Bee hive high load springs the engine not only revs to 7000 RPM it also revs a lot quicker instead of sluggish, and is a lot more lively, and also takes off like a bat out of hell. Night and day difference between 127500cams and 127300cams.