I’ll tell you what, when i bought my 97 silverado 1500 5.7 the plugs hadn’t been changed its entire life amd it was 18 years old almost 19 and it still fire right up… Those 5.7 motors will keep kicking forever! It was a mistake i think to stop making them some of the best engines! The only flaw they have his due to a higher amount of torque sometimes head gaskets get worn out faster thats all i have heard but i have 184xxx miles and my truck starts up with the quickest twist best running truck out of anyone i know. Reliable amd easy to wirk with.