I remember seeing those modified bicycle forks. It looked like someone cut off the small end from the bicycle and because of the taper, just jammed on another pair over top of the them and bolted on the wheel.
I had the standard Schwinn Stingray 5 speed with the Hurst looking shifter on the frame and the drag slick rear tire. I did not mod mine. A couple guys in the neighborhood had those Schwinn "...Crate" bikes with the Springer front forks and little 16"ish front wheel. One guy removed the spring from his to really extend the fork rake (dangerous).