A very import part of any build is to have an overall plan from the fan to the rear tire size. You don't have to do it all at once but you have to know what the end product will be. To do that you have to be honest with yourself about what you want the engine/vehicle to do. Every modification hopefully makes something better but it may have a negative effect in another area. So think it through. For a truck engine I would prefer the 12 weights but if the crank you have is useable it will probably do just fine. You can not do sleeves at home. And they are not cheap to have done.
