2 dude... 30yrs and another 40yrs in the business said somewhat the same thing. Summary: majority of all engines are the same and when using the manual with the basic techniques, you can't go wrong. All these new modification that doesn't all to horsepower are safeties for those that aren't 100% about what they are doing on a selected platforms. Some come with build in ket way but there was a reason for that on each. Others need it some safe keeping but a true build don't need added mods if they knows what they are doing. etc and etc