SM Head Install... forgetting anything?

@pittsburghracer I got the 3922s, but I read that they are on the colder side. Searched SM website, and it says to use colder plugs when adding turbos, SC's, or nitrous and then to use warmer (3923/3924) when no power adders. So, I am going to get the 3924s tomorrow and the NGK equivalent as well. I was going to finish putting the ac on tonight but its cold, so I'll finish it tomorrow.