The Weber/Edelbrock carbs are for guys who have no clue on how to put on a carb and get it dialed in for their engine correctly. The Holley's are for the guys that want the power, performance, reliability & fuel milage all in one carb. I bought a 79 Mustang coupe that had a Weber/Edeljunk on it and it ran ok and took it off bolted on a Holley 600 vac, sec, and holly cow the power and throttle responce was great. Now to be fair I did try to dial in the Weber/Edeljunk and like I said it ran ok but it couldnt, wouldnt and never will ever match what a Holley could do. I took that Weber/Edeljunk carb which was new and thru it up in the air as high as I could to watch it smash on the ground and did that a few times and then my mini sledge finished it off. I didnt want any one else to ever have to deal with such a POS carb so I made sure they couldnt use it. Edelbrock makes some very nice products and their quality is very nice but I just cant figure out why they would put their name on such a POS and give them selfs a black eye like that. The only thing better then a Holley carb is EFI and that is becuse way to many guy can't tune a Holley in so they should stay away from carbs all together.