Temperature sender for 61 dash and 350 block

[AngryPirate]

I have a sensor in there now, but it doesn't really register. I think it did move a little once it got to running temperature, but no where near what I would expect.

I was looking at this one: http://www.summitracing.com/parts/SMP-TS6/?rtype=10

but I didn't want to buy *another* sender and it be incorrect, again.

Also, what would the connector for this sender look like?

Thanks,
AP