Yes. But I will add that cutting down a crown race seat is not always as straight forward as one might think. So it's best left to a guy who knows how to do it. It's easy to cut too much and end up with a slightly loose fitting headset crown race.

A builder could mimic the current fork dimensionally so don't damage or toss it yet. I would let the builder choose the materials. There's reallt not much difference between 1" steerers. Although the motivation to retain original spec for colectors value does have it's merit, if the bike's value justifies it. Andy.