i dont think they're trying to tell you how to drive. just suggesting thaat, it needs more time driving, and some real "hard running" a bit, to see what it does. if it starts pinging or knocking when you floor it, thats an indication of a possible timing problem.

since it runs cool at speed, it sounds as if the fan isnt moving enough air to cool the water, thats in the radiator. this could be due to restricted tubes in the rad. you can pull the radiator out, and a decent shop can take the tanks off, and build a four or even 5 core radiator, using the stock tanks. it will look stock from above, and from behind. the latch tray will hide the rest, and the extra rows, make a huge difference. if you're sure the timing and carb are right (and you might need to "thrash" it a bit, to find out) then you need to address the rad. one other thing, be sure the radiator cap is the correct one, pounds wise. and have it tested, to be sure it's operating in the correct range. the 160 stat isnt an issue. once it's open, it's open, no matter the range. good luck!!!