From some other mopar enthusiast that I have talked to: After tax day in 1970 (April 15) e-body (not sure about b-body)cars were suppose to be equiped with crumple zones. Story goes that a driver was decapitated because the hoods didn't crumple under impact, thus crumple zones were mandated. I believe their are two types of Shaker cuda hoods. Crumple zone or non-crumple zone hoods. Their should be 2 crumple zones on bottom side towards the front outer edges of the hood. Challengers I believe have 3 different types of shaker hoods depending on SPD.
Im just wondering if some hoods might have accidently got put on some cars without the crumple zones in 1971
![](/ubbthreads/images/graemlins/shruggy.gif)
If anyone knows anything about shaker hoods that im not stating or if I am wrong please feel free to correct me!!!