thanks for all the info, i was just wondering b/c i have been looking for a b16a for a little bit and cant find 1. im looking for 1 with bad rings though, so i found a head for pretty cheap and was wondering about the block of the b18's to see if the sleeves were diff in either, like stronger in the b18c or so and i heard about oil squirters but noone i talked to really knew about them. but thanks again for the info