Here's a basic boa genetic calculator: http://www.redtailboabreeder.com/genetics/
You could pair your boa to a hypo to give visual normals and hypos. Another option would be a jungle, though I would get a high expression jungle so you can easier determine if the babies are normals vs low expression jungles (but like balls, just because you have a high quality parent doesn't mean they'll throw high quality babies).
Another cool choice could be your boa to a motley too (these being co-dom). These are super nice; if you want me to post up my A+ baby female let me know.