Hi, I'm building a rod and are about to put a tube axle in the front. At the moment i think it will be a super bell. But to plan the built properly and know what to buy i need som info. when it says that the axle is 4inch drop, it that in comparison to a compleate straight axle or to a stock axle already with a dropshape? On the picture: is the meassurement on the axle cente to centre 4inch in a 4inch drop Super bell? a nother question: is there anyone who produces a tube axle that is straight between the dropps ( like this http://image.rodandcustommagazine.com/f/9995029/0808rc_15_z+dropped_i_beam_axle+.jpg ) but have peaches holes like a super bell?