Robert Shaw thermostats are supposed to be really nice too.. I think you can get them at autozone.
http://www.speedtweaks.net/robertshaw.htm
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84 convt,'95 302,AFR's, performer
3.55's, underdrives BBK shorties
stock cam, 1.7's
13.85@102.5
and a '68 stang that WAS nasty ;-)