Today I scored a very nice steel framed Saracen road bike that looks like it's been left out in the rain from the day it was first bought...

But it has some nice components, so I thought even if the frame is beyond redemption, I can still use the brake levers, shifters, handlebars and derailleurs.

Which I probably still can... Except the shifters and front mech were so rusted that the bolts both snapped under the pressure of trying to loosen them.

In the unlikely event that this bike somehow emerges whole from the rust, and I find it a new home (wrong size for me) will replacement bolts destroy its vintage mojo?

Thanks in advance