I would be leary of that. Only head wobble I have heard in boas is Scorias. Its like the spider gene in BPs. Other than that, the only head wobble i'm familiar with in a boa is IBD unless it has a neuro issue like it was overheated or had something dropped on its head or thumped. Only way to know would be to take it to the vet and get a blood test done to see if its IBD. If it is and the boa is showing symptoms, then it is on the way out and any other snake it gets around will get IBD too and either become carriers in the case of boas or drop dead pretty quick in the case of pythons.