Is us army bct ALOT harder PHYSICALLY than navy basic training?

Well, over 90% pass boot camp, and the 10 that fail because of things like refusal to do anything and drugs. Things like that. So, you'll pass without a doubt. And about you being ready, I say yeah. Like you said, running wise, you'll get it in the limit no doubt. You should be good with pushups and all that too, they give you time to adjust, you don't have to come in as iron man. I recommend trying pull ups too though. Good luck man.