They will run if you do it right. Yes they're heavy. The cars are no heavier than an E55 (automatic trans only) and those will trip 12.4 and 12.5 all day long in stock trim with a good launch.

The clutch needs to be upgraded and stickier tires will be needed. Get abusive and it will need half shafts too.

There are MUCH faster Challengers out there.

We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon