CHT seems high - oil normal? Options

[FlacaProductions]

74 2.0 (details below)
Very gently rolling 2-lane roads. 3000-3500rpm cruise 55-65-ish MPH. Mid-90’s.

This is not a new concern but something I’ve been noticing/monitoring since I got this car 4 years ago. It’s kept at our other home where I get 5-7 day-access 4-5 times a year so it goes in fits and starts. Nothing has made a noticeable difference.

My concern is that head temps seem to skew high as confirmed by Dakota CHT gauge under #3. Pulling a gentle grade, it went to high 300’s and asking a moderate acceleration, CHT goes above 375. Touched 400 a couple of times.

Oil temps stay low 200’s (225) as confirmed by taco plate gauge and Manley dipstick thermometer and react accordingly (ie: in direct but slow relation to the CHT)

According to Jake Raby’s writings: "Engines that cruise at 375 are generally out of tune or may be misconfigured creating more heat.”

Am I making too much of this? In my head, CHT over 400 is baaaaad.

I’m going to run a snake camera around the top of the tins and check the condition of the oil cooler fins today - that’s about all I can think of at this point.

Input? What’s to tune?

Status: timing confirmed at 28 degrees. Idles at 1000 steady. 195/55’s w/speedo calibrated. All tins present and thermostat/flaps are functioning. New oil less than 200 miles ago - Driven DT50 Full-Synthetic 15w50.

Engine specs: “stock performance” rebuild by Brad Mayeur in 2010 with new, original Mahle European pistons and cylinders, Raby FI cam and lifters new German K&S bearings on a std/std crankshaft. Heads completely rebuilt, new stainless valves and new springs by Tuttle’s Parts Exchange.