Edited, Figured it out: Temperature switch

[Supreme Cutlass]

Edit again, I just used one for a 3.4, works great

 

EDIT: Got the old one out, but it only has one wire where the new one has two. WTF? The new one is also a bit shorter, did I get the worng one? (btw, I'm switching from a switch to a sender.

 

What's the best way to get to the temperature switch? rock the engine? (3.1)