Also, I was thinking of making them slow zombies because I just like the more traditional zombies films as opposed to the more modern ones.
I would like to keep both. How I see it, is that the normal ones are more "recent" infected while the slow ones are old and rotting.
On top of that, I was also tweaking around with some scripts and was thinking this also:
In order to kill a zombie, headshots?
You can still kill by shooting them everywhere else, but this would just be the most effective.
The thing about headshots is that the blockhead's head is so large, making it such an easy target. I think crotch shots would be more suitable, since they kind of hold together the whole body - excluding the torso since that is a large area as well.
Think of it like this;
Two shots to the head to kill.
Eight to the torso to kill.
I think you should go with what Red Dead Redemption: Undead Nightmare did. It takes like eighteen shots to anywhere on the body to kill a zombie, but one to the head. But since this is Blockland, we would go with two to three shots to the head - that is, if you don't like the crotch idea.