im swapping a 99 jimmy 4.3 in to my 2001 blazer n yup you guessed it theres a difference my question is when going from a screw in knock sensor(one wire) to a bolt in ( 2 wire) sensor what needs to be done exactly? what size tap am i using? where exactly am i tapping into? do i use the existing knock sensor hole? isnt that whole bigger than the bolt in sensors bolt? my ac delco sensor didnt come with a bolt can i use a stud design? i need alot of info yes but i figure if all these questions could be awnsered with correct how to this would make a great sticky any info is greatly appreciated thanks..