Thanks everyone for your help. It looks like the consensus is for a 90 min boil. I am sure it can't hurt and I have the time. I will adjust for the extra 30 minutes of boil-off. This is the first pilsner heavy grain bill I have brewed. Looking forward to brewing this beer style.
I have a recipe that contains 9.5 lbs of Rahr Premium Pilsner and calls for a 60 minute boil. My question is, sjould I follow the recipie as written or adjust to a 90 minute boil to deal with the DMS issue of Pilsner malts? This is for an Australian Sparkling Ale. (Similar to a Burton Ale).