1966 Barracuda Fan Shroud!

Im searching for a fan shroud for my 66' Barracuda. She over heats a bit and I was told that a shroud would help, however finding one is no easy task. If anyone has any idea of where i can find one or another that i could adapt to it I'd truly appreciate it!

Also any ideas onto why it may over heat could really be helpful.. i read on some other websites that its common.. wouldnt like that however :(

Thank you !