buy it/install it 4 deg adv w a multigroove timing set/break it in w new lifters per "breakin secrets" at www.mototuneusa.com. Assuming your 440 is a low comp one w the pistons ~.100 in the hole so no possibility of VP interference/call it good.That'll change your idle vacuum so to get it spot on retune your dist; initial/total/springs/vac adv in order then attack the carb

live every 24 hour block of time like it's your last day on earth