L89 Head Exhaust Bolt Question

[Hotrodpaul]

Is this the correct Exhaust Bolt to be used with L89 Aluminum Heads? They have the shallow thread root for interference with the internal thread. I guess it keeps them from backing out. Thanks,

http://i3.photobucket.com/albums/y86/Hotrodpaul86/DSCN3674.jpg
http://i3.photobucket.com/albums/y86/Hotrodpaul86/DSCN3676.jpg

Paul