Mopar's best engines. Your opinion and why.

The 426 Hemi.

How quickly it was designed and put into production.

The great out of the gate performance winning immediately in NASCAR.

Forcing the other two to come up with complete new engine designs just to keep up.

Then when they pushed, Chrysler came up with the "Doomsday Hemi" which made them rethink all the rules about allowable engine design.

I can't think of another engine design that has had such an impact on the industry.