Original post by: William Decker ,
Bruce is a sales person - I have heard those balancers on the crank shaft don't really help and many of them get taken off. As far as the ECM custom programming is concerned, make sure you carry a spare ECM just in case you take your truck into the shop and the shop reprograms your ECM. You can then swap ECMs. If you don't - then it's money down the drain for the ECM custom programming.