you drill the head, and yes this is a necessary step, anyone who's made an LS/Vtec themselves will tell you this. dont listen to what people "think" is right.
https://hondaswap.com/general-tech-articles/assembling-ls-vtec-32829/
scroll down to the part that says "the head" and read the first line.
https://hondaswap.com/general-tech-articles/assembling-ls-vtec-32829/
scroll down to the part that says "the head" and read the first line.
