Dont know what to do next...coil pack, programmer or something...but Id like to get a bit more hp/trq or mpg out of this thing. So far Ive got efan, ud pulley, kn drop in, magnaflow waiting to install. Im thinking either a screamin demon or a tune? Not really looking to do rockers yet. Already have 410s on stock height tires too, so no need to re-gear. What do you guys think should be next mod? Truck has 31K miles btw.