Yeah- it's got a Hemi...
#17
A DOHC engine with a cast iron block would weigh even more. Overhead cams make for a heavier engine, all else being the same. The advantage is in better breathin,higher revving, and generally higher fuel economy, but as evidenced by the Corvette Z06 (and to an extend the LS2 engine as well), pushrods are hardly an impediment any longer in those areas.