Bill,
I think most any good engine shop may be able to repair the block but I don't know for sure.
If all else fails, I have one I can spare and even a new one still in the crate (bare except for the mains) and enough spare stuff to perhaps replace all the ingrediants. Pistons etc.
All the other ones I have are complete but one or two will need some work to put them in prime condition.
Let me know if you are interested in obtaining a different block to replace your cracked one. The crate one I think has a cast number of 1950 but I'd have to check to make sure. I have two or three used one that are out of 41s. None are cracked.
I live in Fayetteville, NC.
Best,
Charlie
