Wide glide to a narrow glide, new spokes?

[Spacewolf]

Just what the title says. I've picked up some narrow glide trees for my 41mm wide glide tubes and the WG hub is too wide. I have an extra narrow glide hub that I'd like to lace up to my 21" rim.

Do I need new spokes or can I just lace the new hub up with the old spokes? They're nice stainless Buchanan so I'd like to keep them.

Thanks!