216 to 235 swap, but unsure of engine-numbers

[Moeller]

Hi All,

I have a 1953, 3100 which I have started restoring.

It currently have the (maybe original) 216 engine.

I mentioned to a freind of mine, that I maybe wanted to look for a 235 engine for a future swap - and a couple of days later he called me saying that a freind of a friend of a freind.... - ANYWAY, I have been offered the below pictured 235 which looks nice enough to use for a future swap, BUT I am unsure what to make of the engine numbers. The current owner is not of much help. He does not know what car the engine comes from, or anything else about it actually...

As far as I can see, it it a 1954, 235 engine, but the "J" at the end puzzles me. I am not able to find any reference on that anywhere on the web.

Can anyone shine a light on that?

Also I do not think that I will be able to use the clutch housing on the 235. It seems that it does not have the mounts on the side of the clutch housing as the 216 engine in my truck.
Does thissmean that it comes from a passenger car? I guess I can still use the 235 block itselves with the current 216 clutch housing?