No problem, didn't even to have to wait until next feeding since I still have some of that specific litter with their mother. Allowing for normal variance in the litter, most are around the 65-70 gram range. As I said, these are rat pups around 20-25 days of age so quite good sized and well fleshed since they are both nursing off mom and eating dry food now.
You don't want, of course, to jump up that big overnight. Just a gradual increase in either prey size or total volume (you could try a couple of fat young fuzzies) would likely do that snake quite nicely. I'm always one to go slow and careful with increases until I see the snake is handling the change beautifully.
Remember though most boa's are known for their very strong hunting instincts and long strike range compared to ball pythons. As laid back as Severus is, I wouldn't mess with him once he smells a rat closeby and little Morgaine will wildly smack at her tub unless you are VERY fast with her rat pup.