Guys, my '92 302 HO Ford runs 125-130 degrees normally, 135 degrees after a hard run before returning to normal. I should be able to make more HP by increasing the water temp to, say 160-180 degrees. I surfed the net this Winter and I cant find a thermostat rated above 140 degrees that is 1.5" diameter. I did find this http://www.summitracing.com/parts/krc-1027/overview/). Do you think restricting the water flow using this device would increase the temperature? Other ideas?

Here's a pic of the t-stat I removed 2 years ago. It's only 1.5" diameter so it isn't interchangeable with car t-stats.
photo.JPG

Thx guys, John C