Veitchy

My brother has just bought at our local swapmeet a "Ford T" engine assembly that has us a bit puzzled. On the left side of the block where the Ford script usually is there is a large diamond shaped area with cast lettering in it spelling "IPCO". We talked to about half a dozen T owners at the meet, but no one had ever seen one before and I was wondering if anyone knows the signifigance of this. We speculated that it may just be one of the US non genuine makers products ( also a sugestion from a thread I put on a US website) or maybe one supplied to a different maker for instalation in a different make of car or possibly something from a truck or industrial aplication. The block has a casting date of 1922, and the gear box top has a date of 1923, so it looks like where ever it came from it was early in its life that the two were combined. I have posted this querie on a few sites and have had no "definitive" replies, only the sugestion that it may be an after market replacement although the bloke who replied said it is not listed in his book of non Ford replacement manufacturers.

Does anyone know anything about this block, like where, why and who manufactured it?
I think I have seen one in a restored car somewhere, but for the life of me I cant remember where, and so far I havn't found anyone who has even heard of them.

Thanks blokes,
Graham