Stick with 470 Ohm. The more I think about it, the more I think 2.7K might be used for Pentode wiring as I haven't been able to find it used before the Green Stripe Mark III or the Mark IV but I could be wrong.
5W or similar rated 470 Ohm wirewound resistors would do the job properly and hold up better in future compared to the original 2W carbon ones.