I saw a pit that used truck hinges mounted on the inside of the CC. They were Chevy's Spring? loaded hinges and he claimed he could raise the door with ease and hold it in any position. Sounded cool.
Thanks for the input guys. The hood mounts are a bit heavy duty for this because the piece is only about 12" wide. Ended up welding bolts to the inside of the piece and drilling a hole through the flange using wingnuts to secure it. Since it will only be taken off a handful of times a year when we do whole pigs I thought the bolt option wouldn't be too cumbersome.