Hey y'all. Theres tidbits of info out there about these transmissions but nothing specific to my particular application. I have a 1949 Dodge Coronet Sedan w/ fluid drive, In Ontario Canada. Im putting in a newly rebuild 265 flathead from a 1953 Chrysler I bought a rebuilt/updated 1940 Borg Warner transmission with overdrive (I believe this is an R7) for a console shifter. Has everything I'd need. I'd like to put in this overdrive, and I have conflicting info. I know the R10 is better, but I cant find a rebuilt one for sale. I'll likely take out my transmission and put it side by side with this new one to see the differences but... 1. Has anyone done this swap? 2. Does anyone know the glaring differences in design between the fluid drive and the 1940 w/overdrive? 3. If fabrication is involved, do you know what to expect? The rumours or information I've been told are 1. The input shaft is different, Id need a longer one. (Not sure if true or false) 2. The Bellhousing from my fluid drive will replace the bellhousing on the OD transmission. (not sure if true or false) 3. Id need a long throwout bearing (Which I bought) 4. Id need a new or shortened driveshaft. (I expect this) 5. Some part between engine and trans gets reversed and it miraculously fits. Im very green with this car, or any car but Id like to try and understand what to expect and what Id need to do in order to make this happen. If its too difficult, id likely keep the fluid drive for now, and search for the R10. Any bit of help and all discussion is appreciated!