inquired about gear drive for my 97 4.2l at summit racing/ they had one for the 4.2l early years and was told gear drive did not work well with computer controlled engines, that was it (I trust their answer). Can someone enlighten me as to why, because all I can tell is that the same function will still happen, it just changes the mechanics of how it happens. Plus I would love to put gear drive in this thing while I have it torn down.