Yes, a stock bottom end. I like the 266. My tuner set my idle at 900 rpm and I wish it was a little lower. It takes about 4-5 seconds for the idle to drop down at a red light but when it does it has a nice chop, lope sound. It has a very strong 2nd gear, which is about all that I have used so for. No burn outs from first. The only thing I don't like about the cam is the low speed lurch that the guy on the video talked about. Cruising at a car show or bumper to bumper traffic in 1st gear at about 1200 rpm it will want to jump and you have to push the clutch in to make it stop. The 274 may be even worse in those situations, I don't know. I wanted a Ford B303 but some reviewers said it wasn't a friendly ever day driver in slow traffic or parking lot traffic. I think they were talking about what mine is doing. I think, don't know, that maybe the more lift a cam has, the more rpm's it likes while it is under power. They will idle and sound good but if you put a little strain on them , then they like the higher rpm's. I don't want to start a argument about the B cams. Some will probably chime in and say that theirs does good in low speed traffic. I know they sound very good and will make a 302/5.0 scream.