bad hesitation

["Fred Thomas" <vafred@erols.com>]

2 weeks ago I changed both manifolds on the 78 1500, every since then I
cannot get the car to run without a very bad hesitation in every gear when
accellerating, except 4th and then you must keep the pedal down in order not
to have hesitation, I have reset the timing, readjusted the carb 20 times,
checked the entire system for air leaks and found none, today I changed the
EGR valve, and, now you know the rest of the story, she runs as was
intended.  "FT"