Modern Drivetrain Swap

There are a few companies doing full frames for the challenger and you just put the car on it.

Check out http://roadstershop.com/chassis/1970-74-challengercuda/

Enjoy the very best if you can afford it. If going all out and money is no object a 6.4L with TR6060 can be had....

Your limit is only bound by your budget!

Riddler