Thanks for all the replies, no hasn't overheated only went up very slightly over halfway for maybe 5 min, no coolant in oil, coolant clean but strong fuel smell in overflow tank and loosing fair amount of coolant recently, also noticed a light whiteish smoke on startup in nice warm climate. I watch this thing like a starving hawk and no leaks that can seen and hoses are good and secure.
As far as slipped liner concern, i've got 216k on the clock and gets an ticking once it's warm but not consistent and goes away at higher RPM, noticed a loss of power in top end and halfway traced the sound to what seems like top-middle of engine. I changed the oil to 10-40 and added Lucas additive which helped for about 250 mi and then after long drive in warm weather, came back
Would a compression and HG sniffer test prove anything either way? Waht else should I consider doing while I've got her open, heads, cam, lifters etc?
I'm doing my best to diagnose as much as I can without going to a shop...not so much to save money, but more like a rover survivor man