ORIGINAL: RoswellGrey
Actually, on the street, most of the time a 440 Magnum will outrun a Hemi, simply because a Hemi won't stay tuned long enough to do anything. That's why Hemis were never that popular in the old days.
It depends which 426 Hemi you are talking about. The solid lifter Hemis required constant maintenance to keep them in tune. When Dodge and Plymouth switched to hydralic lifters in 1970 it was easier to keep the engine running at peak performance.
The Hemis were also a very expensive option and carried a very high insurance premium.