I have her in a 3ft long cage now. I've asked two people for advice (one of which has 80+ snakes in his collection, so he knows a thing or two) and they have both said that if I have the space in house I should make the enclosure at least 5 ft. long.
She (the boa) has been acting more *curious* than normal lately. I asked someone at my local zoo what she thought and she said it might be that she's outgrown her cage.
When I have her out of her cage she does quite a bit of climbing, hence why I thought it would be a good idea to give her some climbing space in the tank.