I've just done the same and yes some needed some heat to loosen. Are you going to pull out the spraybar? you can also pop out the cam end plug and plate that as well
Watch this
https://www.youtube.com/watch?v=r8qzvnoSEog&list=PLkWFofpgz2OgdnVCiMm4834QmoZydBqps&index=1&t=1276s
Though he doesn't remove the studs