I think I said everybody to his own as you are certainly free to do with your bike as you like. Some aspects in classics have become religion unfortunately and that is overwhelmingly true when you expose your bike to concours judges - which leads to rivet counters finding ridiculous criteria for failing your bike to get max. points. And that is the real non-existent freedom to have your classic as you´d like it to fulfil your dreams. You are simply limited in all components to factory specification - or so the present times make us to believe, the proof is not always quite so proof. You are certainly free to decide in going concours with all consequences - or be free and enjoy yourself and fit what you think is cool and racy . The public will love to find all those bits they remembered from their younger times at the Ace or so. Nobody with a sports heart kept his bike bog-standard - ahmmm concours - but spent his last penny for goodies. Today bikers get scared to leave their classics as they were rescued from these times and go for 1000 percent restauration to "original" . A shame as the biker´s society has lost a lot of colour by returning the specials to standard. So as I know a lot of bikes well enough when I see an "original" from a distance I save my time and look elsewhere , nothing to be found interesting on the common original - sorry.
And carbon or stainless, my choice is clear, I hate rust, on threads as well, I hate having to deal with paters. So simple decision, go stainless and once finished it will last infinitely, more or less. The material is not cheap, with 18 percent chrome and 10 percent nickel it can not possibly. And machining it is for experienced mechanics, when you deal with higher strength alloys. So when some here do remarks about cheap stainless - unlike carbon steel miserably plated, now that is religion in a bad way.
In the metric world, 6 billion people , a few hundred million in imperial, a quality ss bolt got head marks like A 2 -70 or A 4 -80 for the type and tensile strength of the fastener, so what is unknown here ? Hex bar easy machinable is min. 500 N/mm2 , bolts 700 resp. 800 N/mm2 strength, will stretch more than carbon steel but tough and no brittleness at all. Could not find old photos of a test I did once. Yes, religion is belief, not knowledge and stainless is one matter in classics forums. Well , we got forums for info , but discussions as well I was thinking ?
Vic