i was told by someone that on an LS/Vtec setup drilling the hole in the block for the knock sensor is not simple, and can acually mess up the block if not done properly, my other option was to go hondata,but hondata doesn't offer any of there system for OBD0, so is there any other way around it?any advice i can get,should i get rid of the block, can i use it and just drill the hole?BY the way i have a 90 b18A1 block