Hello I just came across an add on NY Craigslist. Vintage ford parts place is going to close after 60 years , I called they do not have any 272, 292 or 312 blocks but they do have  

215 6 Cylinder
223 6 Cylinder
256 8 Cylinder
317 8 Cylinder 
 
The engine blocks are NEW in the original ford shipping crates 75.00 each .  Just search New Old Stock Ford Engine Blocks in the NY Queens section on Craigslist I have the phone number but I do not know if I can post it. He has other parts but he said lots of his yblock stuff is gone .