You have good heads and a big cam for a stock stroke engine so I wouldn't be surprised that it is still pulling at 7000 rpm. Most strokers lay over well before then, even with MW heads. Yeah, it's got no problem carrying the HP beyond the 6800 peak point. Old and new comparison chart below.
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)
| 
