That makes sense, and I always wondered what Chrysler was thinking by doing that. but the two front cylinders being 50 degrees cooler doesn't make all that much sense.
Combustion temp is more important.
Things saturate when crowded, so it's not anything to worry about.
There's also that small element of mixture variation from intake runner to run her and unless you know that they're all exactly the same you can't really attribute it solely to siamese ports.
