Will a 1990 2x4 Toyota cab fit 4x4 frame?
No, a 1990 2x4 Toyota cab will not fit on a 4x4 frame. The frames for 2x4 and 4x4 trucks are different and the cab mounts are in different locations. Additionally, the 4x4 frame is wider than the 2x4 frame, so the cab would not fit properly.