Hey I'm just wondering if a 1990 2.2 head is interchangeable with my 1994 cav? When I look up parts I find for my 94 it asks if my 94 head has been drilled and tapped for water passage!! But the 90 just has one 2.2 head option. I'm not a big engine head so I came to the people that know....you guys!!! Can I tell if my 94 has been drilled and tapped while it is still on or can you only tell from removing the head? I was also wondering if I could use the 90 head can I use the entire head assembly, meaning throttle body and all? Thanks