I posted this in the '47-'59 section already, but thought you guys might get a kick out of it also.
I came across this on the Denver area craigslist and thought you guys might get a kick out of it. Someone combined the front end of a 1951 Buick with the back cab from a '49 3100 and the bed from a '55. The listing owner says it was done in the late 50's. Looks killer. There are a few more pics on the listing, one shows the area where the cab and the Buick were combined. Looks good in the picture.
http://denver.craigslist.org/cto/1059528781.html