They will physically bolt up fine, you might need a spacer on the front to clear the tie rodes, as the backspace is a bit deeper on the GMT400 trucks from what was on the '55s. However, there is a different issue you need to know about, the wheels from the '13 truck will not fit on you '94, the backspace is far too deep. If you hade a 4x4, it would work, but not on a 2wd.
