caging question

Hey I was just wondering if an adult male bci could live in a boaphile 421d cage with no problems?
thanks

I was also wondering that. Would it work with a BCC male too?

For awhile yes but not for life unless you feed the boa as much as it needs to stay up to weight and healthy. I would just build a 6' by 2' cage and that would be ok for even a large male bcc of any kind.