Thanks for all the help! I am going to re-check the points mentioned in the carb by breaking it down further. When I first installed the 4-barrel and cranked the engine for the first time, I don't remember having this flat spot in run-up. So, it probably has to be some crud that I missed when I cleaned out the jets and squirter holes before. I will look at the tach today when I crank it and see when this stall is occuring. Thanks again for all the possibilities....I'll let you know what happens.