Or you could jsut save boatlaods of money and build a normal engine for the car that has its own timing control (distributor), and a throttle cable and a lot more torque and less brittle parts.
I work for chrysler, and I was trained on how the new hemis are built and have seen them apart etc. There is no way I would pay more than a real motor and put one of those in an old mopar and beat on it. PLUS if you ever broke it youd be spending lots of money to get any replacement parts.

Just my