I suspect the "overlap" area is more on the 360 shorter stroke crank giving it more meat to withstand the stresses involved. If both cranks were on a table in front of you, it would likely be easy to see.
As for an Eagle forged crank (not cast), I'm guilty. I got one used that was in a 408 that ran 10.80's for several years. Then it sat for about 12 years and I bought it in a package deal. I'm guessing it's about 20+ years old now. It's in my 408 on its 3rd year now and still going. Low 11's only though. (Don - hope I never "run over it!! :eek:)