Been hectic lately trying to chase down parts etc etc... I pretty much finally have everything needed to start the rebuild have my head back in one piece all rebuilt ready to go on the car..
I have the Z20let gaskit, according to what i can find on here you drill out 3 of the rivets, however, having placed the gaskit over the head for a quick squizz, i notice that in fact all of the rivets line up on the head surface anyway... so why only 3??? surely they all want coming off so the gaskit compresses properly? perhaps i have a slightly different head, its an early *cough ks* head, and tbh all the holes line up perfectly also, the only difference being the coolant jacket has two 3-4mm holes and a channel instead of a cutout.. or is that the "small" difference in size people are referring to??