Truckedup brought up a good point -- one that me questioning my wisdom. I have a 56 sedan and am in the process of putting a 200R4 behind the 235 using Langdons adapter -- I have from another forum been informed that this is not a good idea due to vibrations and flexplate failures. I'm not about to bash Langdon on this as I haven't got mine up and running, but I'm would really like to talk to someone who has performed this swap and it has been sucessful. I'm still probably about 2 months away from having mine on the road. I'll keep all informed if interested.