I had a 1411 Edelbrock 750 cfm on my 454 with a Weiand dual plane intake. The 1411 was ok but after reading the reviews for the most recent AVS2 model Edelbrock carb. I’m using the 1912 (I think) 800 cfm. It’s been flawless right out of the box, especially the idle to just off idle & low speed cruising. Do a Google search for what others are saying about it

1966 C-10 Short Stepside
HiPo
Step-by-step ~ and on-going resto build
in the Project Journals