The GM and Ford guys had a head start on us.

I have a theory to explain why the Mopar crowd may be behind the times as compared to the GM and Ford guys:
While Chrysler abandoned REAR wheel drive performance cars in the 70s, the other guys soldiered on. The Camaro/Firebird along with the G body Monte Carlo, Cutlass, Gran Prix and Regal Grand National kept the flame alive. They were the benefactors of engine management and EFI. The Mustangs packed a punch in the 5.0 and SVO cars too. The theme of "refining" the RWD platform into a good handling, good stopping car wasn't lost on the GM and Ford guys either. While our competition was still building tradional RWD cars, we were stuck with Turbo front wheel peel. The attributes of FWD performance don't cross over to RWD applications.
The guys today in classic Camaros and Chevelles are often using modern engines like the LS series. The modern engines are often matched with bigger brakes and upgraded suspensions.
If Ma Mopar had kept refining the Barracuda or Challenger instead of pulling the plug to focus on the Volare and Aspen, MORE of us would easily embrace a Modified approach to out Mopar build.
Instead, we have a greater percentage of stock or 90% stock cars that look great as a historical reference but are totally outgunned on a race track of any type.