I think if you really want that feeling of being pushed back in the seat, the solution is sloppy, softly sprung suspension and a big cushy seat.
I dont know about this.....my dads c5 puts me in the back of my seat no problems at all! 375torque and 310whp convertible and i am thrown in the back of my seat very easily..... A durango with the 6.0?(the one that came with the bigger engine than the 5.4) didnt put me in the back of seat like the vet did, or my buddies rx-7. I think a lot of it depends on the person as well as the gearing, its the whole "tomato, tomatO" thing.