Let me know if you want on the Drag Racing ping list....
Update: The new 6.1 Hemi makes 425 bhp, has 10.3 to 1 compression, 30% bigger ports and hollow, sodium filled valves like the old Ford 427 SOHC engine used to have.
Chrysler is also coming out with a 392 cube hemi crate engine for racing only that has 505 hp.
“As of yesterday (Feb. 9), Challenger was given a “go” by management. Model year unknown. 6.1 liter Hemi and 6-speed manual transmission only.” — “Der Spien,” a former engineer with DCX.
The Hemi has 425 hp, 420 lb-ft of torque, and a six-speed manual transmission. So geared, with its 4,100 pound weight, it can do 0-60 in 4.5 seconds (with 20 inch wheels on front and 21 inch wheels on back), and runs the quarter mile in 13 seconds flat; top speed is 174 mph (limited by wind resistance), while gas mileage is estimated at 14 city, 20 highway, very good compared with the original Challenger. Brakes are more effective than the original - stopping from 60 mph can be done in 133 feet.
http://www.allpar.com/cars/dodge/challenger.html