Kevin, I am very interested in your installation of the F40 transmission and what modifications you had to perform to install it. Photos, measurements and your insight as a reply would be very appreciated. I am new to the DFG forum and am just starting to gather up parts - engine, transmission - before committing to purchasing a donor vehicle. I am leaning toward the F40 transmission, needing real world input, and your experience will be a great help to me. Thanks for any information that you can share beyond that already posted here in your build log.