How old are you? What’s your tax bracket? How much longer do you plan on saving/working for before retiring? Will you future contributions be Roth or traditional? Do you have kids? Do you think you’ll be making more money in the future?
I wouldn’t as it might bump you into the next tax bracket making the whole move more expensive than necessary.
I’d just roll it into a traditional IRA and if you really insist on Roth conversions, do it gradually filling up your current tax bracket and no more.
Would you plan to pay taxes from the 401k account, or do you have cash to pay the taxes? If paying from 401k, then hard no. If paying cash, I’d spread out the Roth conversion over multiple tax years.