I have not personally owned a edlebrock carb, but this is what I have heard. The edlebrock needs less tuning but can be a real pain to actually tune, a holly needs tuned more often but is simple to work on. I have had the motor craft carb and loved it, did great on side hills, even rolled it on its side once and it stayed running. The holly is tempermental off road, on side hills, bouncy sections, and rough hill climbs it wants to flood out, I have a big holly 650DP though, total street carb. If given a choice between the two and they were free, I would probably still pick the holly. If I didn't have big hp I would probably pick the motorcraft, but would not spend the money to swap them if I already had the holly. The holly truck avenger is a off road carb that is designed to not have the problems that other hollies have off road.