Originally Posted by DrinkNoH2O
Personally I would just wait to brew the barley wine and then pitch the appropriate amount of Pacman slurry from the IPA cake once the IPA fully completes fermenting. The barley wine is going to take months before it's really aged enough to be at it's peak, so what's another week.
If you're itching to brew this weekend maybe brew a nice ale with the US-05 to tide you over somewhat while waiting on the barley wine.
Nothiing good comes from rushing a brew. Wait until you can pitch the correct amount of the proper yeast.
Brew something else tonight.