If you have not yet read the book Flight of the Old Dog by Dale Brown I strongly urge you to do so.
Imagine a 767 equipped as a flying battleship.
I think you would enjoy it quite a bit.
It's a B52 which we have a lot of but I seem to recall they had replaced the entire fuselage with carbon fiber??
I don't mind being asked to suspend belief but I do have a problem when it's suspended and trampled on and suspended again and then flushed down the toilet.
If you like Dale Brown and I have read his books where he is much better, it's worth reading as it is his first book I think. Dale Brown also once had a commission in the AF, I just looked him up, he had 2,500 hours in a B52 so he should know better and yes, he knows more than me but it is not a trivial matter to replace the the fuselage with carbon fiber; it's not like changing your clutch. My expertise with the B52 is sitting at the end of the runway drinking beer and watching them take off on alert which is really cool and I miss it and Mather Field.