When I saw the pic of the Indy vs Predator heads side by side, the first thought that came to mind was: That's a good comparison between 1980 and 2000 cylinder head technology. Then I remembered this is a Mopar site and had to correct my thought: That's a good comparison between 1990 and 2010 cylinder head technology.  
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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