Mopar Magnum

It should be plenty fast with either of the 360 magnum crates assuming they are running right. Will it boil those tires? If not the tranny may be slipping, it may have 2.73 gears and a low stall or maybe those manifolds are killing it if is the 380 HP version. I wouldn't mess with any internal stuff like cams until the existing motor is running like it should. The car is as light as a new Civic so anything over 300hp should impress.