Some people do call FE's Y Blocks even though they were not ever known as that to the best of my knowledge. They do have similar deep skirt design so I think that's where it comes from. But so do Hemi's and other Chrysler big blocks, LS's and many more. No one's calling those Y Blocks.
Another possibility is that the 352 is a stroked 292 or 312. There is at least one of those that I know of.
FE's are not what is known as the Y-Block. You order Y Block parts for your FE and you will have a hard time getting it assembled.
Lawrenceville, GA