The block and head numbers are listed in an earlier post and Inliner's website indicates that the engine is a 55-57 235. If the style of engine ID started in 1957, then it would seem that I have a 1957 235 that was once in a car, but at some point was put into a big truck with a 4-speed and a driveshaft e-brake (since that's what is hanging off the back of it now). A 235 with hyd lifters would be a nice replacement for my 216.
I think since it is still on the trailer, I will run it down to the engine shop and have them dig into it and tell me if it is a good candidate for (A) a rebuild or (B) a source of parts. I'm hoping for (A).