[ekrupa2]

Hi Jay - I just documented all of my spec's for Roush as they asked the same question. There is no dot on the carb at all (and I looked all over). The motor was built in October 07. Cold Idle = 1600 Hot Idle = 1000 Initial Timing=14 Deg Timing @ 4000 = 31 Deg Manifold Vacuum at idle = 13-14. Altitude = 700 MSL

Edit - I am fairly certain the root cause is the accelerator pump as the hestiation is immediate when giving it just a bit of throttle. After the stumble it runs great.