One of the 550s I picked has a serial number within the first 500 or so made from what I can tell. Since I read that thread about putting x's in the VINs, I'm paranoid about putting the whole VIN here. It's a 550f with a build date of 11/74, like said one of the first 500 (give or take) off the assembly line. Naturally it's the one that didn't come with the title of the two I got. Is that reason enough for me to keep the frame and engine together and go through the trouble of titling it?