Just installed mine (451 on a 6-speed)... Once the washer was out, everything came apart easily with the exception of removing the clips that hold the plug onto the pedal assembly.

By laying on my back I was able to use my hands to guide the pin at the top of the pedal back into it's bracket quite easily..

I just took it for a 15 mile drive, and it feels as if the car receives a surge of power every time I touch the accelerator pedal. It's possibly a little too sensitive for my driving style and traffic conditions, but it is definately fun.

I used to use the gas in reverse and when idling, probably can't do that anymore