tunnel ram fuel line questions

I agree with R3, the temp will be inaccurate if above the thermostat. I could see where drilling into a nice manifold like that, would be nerve wracking; but it looks like you have a nice area to drill and tap your own hole in the side of the manifold below the thermostat. You would want to make sure the temp probe will not interfere with the thermostat, but looks like it would work.