Went to Edelbrock's site and downloaded the manual. When I pulled the truck into the garage, I let it warm up to operating temperature with the air cleaner off. I noticed that the choke was barely open. Followed Edelbrock's procedure to adjust the choke at op temp. Big difference in performance. I think this was my issue, it has not stalled out yet under load all weekend.

Thanks for everyone's help and for reading my post.

Steve