Autometer temp guage sender

[clean96GST]

So I got an Autometer Phantom Water temp guage, with all the wires just cut like 1" off it. So there is a few senders on ebay, which one should I get? This is the Autometer one, it looks like I'd have to drill into the tstat housing to install, right? And it doesn't say if it comes with the wires. Then theres this Summit one thats a barb. What do you guys think?
Does anyone know of a kit thats everything but the guage?

 

[peon_slayer]

if you are running a 2g thermostat housing then yes you will need to tap it from what i can remember, if you have a 1g how ever there is a spot where you can just take a plug out and jam it in there, or you could just take your stock sender out and put it there, however you will lose your dummy light