Take a look at this video and fire away at your comments. I have never seen one do this before as far as a very small fluctuation between two very close inches of mercury (19 and 20). The vibration is gone from before the carb rebuild, but I wonder what gives? 4 of the 8 plugs I removed were fuel/carbon fouled, the other 4 were just fine. Cylinder #5 does show a much lower exhaust temperature at the manifold exit than all of the other exhaust ports. (used an infrared thermometer) But I don't know if that is because #5 is so close to the radiator cooling fan or what.
https://vimeo.com/331574496and here is a link to another video I made concerning exhaust temperatures:
https://vimeo.com/331576377<iframe src="
https://player.vimeo.com/video/331576377" width="640" height="360" frameborder="0" allow="autoplay; fullscreen" allowfullscreen></iframe>
<p><a href="
https://vimeo.com/331576377">1955 Ford Fairlane 292 Ford Exhaust Port Temperature Readings</a> from <a href="
https://vimeo.com/user66981451">Daniel Jessup</a> on <a href="
https://vimeo.com">Vimeo</a>.</p>
Daniel JessupLancaster, California
aka "The Hot Rod Reverend" 
check out the 1955 Ford Fairlane build at www.hotrodreverend.com