I have a new AED850HO on my 410 with a .631 lift cam 242@258 108 LSA.The car idles at 1000rpm no problem.Timing is at 36 with MSD dizzy locked.Summit now sells the AED carbs.It,s a hogged out Holley dp and has excellent responce.Good luck.
I can't afford a new carb right now. I did find that there was a vacuum leak around the base gasket, so I replaced them. I checked the base plate to see if it's warped, and it's not. Now, I can't even get it to start. I'll take it apart tomorrow and make sure it's clean. I had both bowls off earlier, and there was a small piece of plastic in the rear bowl, I think from the clear sight glasses I put in, so I took those out. It's possible there's more in there that I missed.