Has anybody replaced a Merc-o-matic with a C4 or C5 in a 1951, 1952, or 1953 Mercury behind a Flathead? I'm considering doing this in the future. I've got the Mercomatic column, and I'm curious if there are any obstacles that may present themselves while replacing the transmission. I'm aware of the Speedway conversion kit or Flatomatic conversion kit needed. I wouldn't need to replace the column, would I? Are the column to trans linkages fairly easy to modify or create? If you've used of those kits, would you share your opinion of how well it worked? http://www.speedwaymotors.com/Flathead-V8-to-Ford-C4-Auto-Transmission-Conversion-Kit,8947.html http://www.speedwaymotors.com/Flathead-V8-to-Ford-C4-Transmission-Basic-Adapter-Kit,11051.html http://www.flat-o.com/carproducts/flatomatic.htm Thank you in advance, Gentlemen. .