Bad stuff happened in the #4 cylinder on my motor. Don't want to replace this motor with another SPI. If I do a Zetec swap, will a motor from an Escort or Contour work? Will I have to install a different automatic transmission? I have read conflicting information on this. I'll be getting started soon and am debating on buying a donor car or going to the Pick-n-pull. I need to know a little more first.