Just use 6.75lbs of Pilsner DME in place of the pilsner grain.
fast n dirty convert:
77.1% 6.75 lbs. Pilsen DME
22.9% 2.00 lbs. Beet Sugar
SG 1.076
But I haven't done extract brews in a longtime, you may have to use alittle more sugar & less DME to get the beer dry enough.
Oh and make a huge yeast starter
