If you are set with 1 sandwich per person, go at least 1/3 lb PP.
175 / .333 = 57.75 x 2 = 115 lbs of uncooked butts.
Double check your beans, for the life of me am having a hard time converting quarts.
On edit, bad math.
Pitmaster @ Lockharts BBQ
I cook the best brisket north of Dallas. Get over it.
Northern midwest director for OBR
BBQ Person of the Year 2013