would a http://www.allstarperformance.com/specSheets/pdf/320.pdf like this 63 micron be adequate for 700 hp ?

yes

cool even as a pre filter that's great news thanks .

I called allstar yet they wouldn't give me a GPH number but a gallon per minute. whats even funnier they said the element would flow 12 gallons a minute I was like yeah rite ?

flow rate would primarily depend on the pressure applied to the filter and the fitting size

fuel calculations are normally done in pounds per hour

that filter will support 700 hp easily