Personaly I have seen much worse being bocked on to the extreme
I'd take the hoof off and have a look at how far it has gone and if it has missed the bolt hole I would tape it well and continue
My first fibreglass springs delaminated under the cover quite badly but it wasn't untill I'd worn them out that I noticed
If they feel strange I would check the rest of the spring and all the joints on that Bock as that split shouldn't make any difference
Post another pic if you take the hoof off
Jason