Which is a better pickup carb?

[rockman20]

Well, I have my choice down to 2. The Holley Truck Avenger which I do not remember the part# right now or the Edelbrock AVS with part # 1825. Here are my specs.

82 Chev Scottsdale with a SBC 355. (I believe that is a 350 bored 30 over.......) It has an Extreme 4X4 cam, around 9.5:1 compression, headers, accel super coil, Edelbrock Performer intake, and the rest is stock. It currently has a Rochester on it.

My reason for changing.

Right now under part throttle while pulling, the vehicle tends to shutter every now and again. If you nail the throttle to the floor, it smooths out. Basically as soon as you get the secondaries open, the shutter disappears. So I have kind of ruled out a fuel delivery problem cuz I would assume that would get worse at WOT. I have ruled out timing or ignition issues because I would suspect that to get worse at WOT as well. If I can get the pickup moving while it is cold yet (choke on) you don't notice the shutter near as bad as when the choke is off. So I am guessing that this needs to be a problem with the fuel flow on the primary side of things.

I could re-jet the primaries but I really hate that damn air horn gasket that they put on those. They uaually tear on me every time I remove them.

The pickup does see off road use. And it sees a lot of pulling. Which carb do you think would best fit my needs? I am kind of leaning towards the Edelbrock because I know them........but I am not going to rule out the Holley.