yeah i actually replaced all the plugs today they were dirty i noticed a little difference i mean before when i got the truck it was eating gas like it was its job lol but i drove it before and i can see a difference . mabye i will leave the 454 sounds like a good idea hey thats why im here asking the experts. i have one other problem what would the normal idle be on that motor it seems to high like if i go from park to r is bangs and sounds high the throttle screw is at its lowest and after running the idle will seem to come down a bit someone said it could be a sensor or this or that just wondering if someone had this problem thanks again jay