Cylinder Head Temp Variation

[68Formula]

I'm hoping someone will have hard data on this.

For the sake of simplicity, lets assume a layout like the traditional small block Chevy (many other makes are just like this):

• Firing Order 1-8-4-3-6-5-7-2
• Middle two cylinders have adjacent exhaust runners
• Air/fuel ratio identical in all cylinders

What is the typical temperature variance between each cylinder? I would assume the middle two would run hotter due to the pairing of the exhaust runners. Not sure where the rear (firewall) cylinders would end up.