170 Thermostat?

My 367 ran hot, at under 30mph from day-one. So hot that if I shut it off. it would lock up, and I would have to wait ~30 minutes with the hood open, before attempting a restart. It killed a couple of starters. I tried everything to fix it. Finally I took it out and honed the cylinders out .001, and regapped the top rings to a .032 to .034.... IIRC
Problem solved,
So much so, that I increased the minimum coolant temp to 195, and adjusted the Thermostatic clutch to a lil hotter. I got the idea to run hotter from Smokey's book. So now it runs at 207 rock-steady.

IDK if my car would be any faster with a lower stat, but I do know that it went 93 in the Eighth @3457 pounds, at 950 or so feet, with a 230*@.050 cam, at 207*F , on a hot July afternoon. I think my car likes 207; anyway, it's been there since about 2001. The timed run didn't come until 2004 IIRC. Or maybe it was 2007,I forget.
Edit; OOTB Edelbrock heads @10.95 Scr.