Im about to get an 86 camaro and i need to know how i can get better gas mileage?

its an 350sb wit big valve mild ported heads, elderbrock intake with 650 elderbrock carb HEI distributor with and advanced curve kit. it has a new cam and lifters from comp cam new double roller timeing chain from zoom new hooker headers from jegs with complete flowmaster exhaust. it also has an 700r4 trans with an B&M shift kit and an new 3:42 rear end what can i do to get better gas mileage