hey i was wondering if you can put a 16 valve head on 8 valve block.. a friend is wanting me to replace the 8 valve head on his CX engine (d15b8) with a 16 valve d15b7 head.

ive never really paid any attention to the pistons in a cx engine. are there valve reliefs for just two valves on the pistons like how there is 4 valve reliefs on the dx pistons?

basically just need to know if i can just swap the heads without fearing the valves hitting the pistons or something.. thanks!