howard.........theres an old saying, that it's only worth what someone will pay for it, and if you are only building it to make a profit, the sad thing is, you never will.
however if you are building it for your own pleasure, then do what you want to do with it to make it into a pleasurable build for yourself and your own experience and joy. and if that means updating it with modern more realistic fittings, go for it.
it was a nice kit in its day, but when I updated the hull and superstructure for Dave Metcalf by rejigging the hull especially the tunnels to take grp moulds off, which models by design has, Dave also uprated the fittings set to bring it into the 21st century.........still the same lifeboat, but just more modern.........so, your choice and your decision, and no one can moan at you for making the choice that you do.
neil.