Bought at a swap meet I don't know who made it. but it fits the description in the "Housing Discussion". And, as such, it was a mistake. The restricted area is back in several inched and I may try to get a cutter in there, but, that will wait for the time being.

There was a good aluminum pump on it and I couldn't see in there with it in place. I had forgot about this "known problem" when I picked it up, but upon pump removal, saw the "mistake". Thanks for the info, and especially the link to the previous discussion.