It actually is no worse than stock on the low end, at least at part throttle, and midrange power is much improved. Idles at 650-700 with 18" of vacuum. I seldom really lay into it and it would probably run about as well with the stock cam but I'm pretty happy with how it runs. I've got a 3.55 rear to install when I get to it but I enjoy driving it pretty well as it sits. I will say I may have got a lucky tolerance stack up in the engine as it still pumps 150ish with that cam. Shortblock and heads are 100% factory original with about 42000 miles.