Xr400 cam more low end or high end?

[alping45]

I just purchased a gorgeous very low hour X400 cam and was going to put in it in my 400ex, but was wondering what the difference will be. All I really want is more low end torque, will this cam help on the bottom or take the bottom away and add to the top? I just got a sparks timing advance key and planning on putting that in as well.

should be an all around gain and with the key you probally wont notice any bottom end loss