allblowdup

I need to get 900 hp min at 5500 max from an ls biuld and have it run on max91 octane 87 would be preffered. Can it be done.? My thoughs are an Erl 500 ci long block with a vortech v7syi through an air to colld water inetercooler and 7-8 lbs boost. I have gotten pretty close on BBF before at 5 psi and 87 octane. 800 hp
Any thoughts?