That tallies with some readings I took recently after a 50 mi, 80F run. 167F oil in tank, 260 rear, 280 front head temps, didn't take engine readings.
I invariably get higher front head readings than rear., which somewhat surprises me. I was told years ago that the front cyl ran hotter because
it got less oil, which I believed. But with all the oil flying around in there now, that temperature differential still seems to be present. ???
Anyway, at 4K miles, the bores and cylinders still look good, with no ridge worn as yet. I didn't mike anything, wish I had now...