What engine is it behind?
Ed
That's a great question. My engine doesn't have a serial number, so it's probably a replacement. I just found the casting number page, so I'll have to look for those so I can see if it's a 235 or 261.
So are you saying that it could be a Clark, but just an older aluminum free variety? Maybe like a 207V? I can't find good pictures of these things anywhere online. It's like pulling teeth.