Hmmm...
Are you talking Mopar B-bodies or GM B-bodies...s the AMT GM B-bodies (Impalas, etc) all have normal hoods...
As far as the Mopars, I've never seen one with a 'hole cast in the hood'...the ones I've bought all have normal hoods..'68 Road Runner, '69 GTX ht and convertible, '70 Super Bee...the Pro Street Super Bee, maybe?