I saw early in this thread a note that the 413 was used in RV's through 77. I knew it remained for some time in heavy duty use, but didn't know they used the 413 that long. I have a 78 RV, and it does indeed have a 440. I'd guess a 78 or later RV would be a great 440 donor. In these applications, the water pump/heads/something was different for extra cooling. It would be helpful in deciding if these motors are reasonable/economical replacements if some of you who know could describe these differences, whether they affect performance negatively or positively in a (slightly) lighter Imperial, and if the differences can be eliminated economically during a rebuild. Mine, as is, along with the frame (shortened), suspension, etc., is going under my D100 cab and bed to make the "Imperial Hauler." Maybe Darth Vader Black if I can get the body straight enough. Michael ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm