Snakes with wide heads?

(Unexpected topic from the title)

A strange question: What are some non-venomous or rear-fanged snakes that have wide heads, that appear most similar to the head shape of vipers? Feel free to list any and all types native to any country, even if uncommon/rare. I'm actually looking for a list of uncommon species.

I really just like the viper's super wide head shape, but obviously I'm not going to own hots. I was looking at Malaysian Mangrove Snakes, which kind of apply to "wide head"... What are some others?

viper boas? Maybe blood pythons and short tail pythons as well. Those are the only two I can think of off the top of my head though.

Cheynei and Sanzinia both look they could be packing venom glands.

http://i839.photobucket.com/albums/z...akes/jcp04.jpg

http://i839.photobucket.com/albums/z...s/100_0704.jpg