Mr. mcmillal:
One thing that gets bantered about (almost irresponsibly) in these pages is the static timing advance value. The 200 I6, in particular, is very tolerant of long spark advance at low engine speeds, so some of us add too much static advance. This causes extra engine heat, especially in heavy, slow traffic.
Try 2 things: first, reduce your static timing if it's more than 8 degrees. Second, check that slot inside the distributor. Whatever value it has, use this value to determine the MAX static advance to use:
38 - ( (Slot Value) x 2) = static degrees.
For example, is the slot is 13 degrees, like one of mine (there are usually 2 different slots, one is unused), the formula would become:
38 - (13 x 2) = 38-26 = 12 degrees.
I find that 12 degrees makes mine overheat in summer traffic, but 8 degrees lets the temperature needle stay below "NORMAL" in the gauge. The happy medium is somewhere in between, like 10 degrees.
I get best power with 12 degrees, but best gas mileage at 8 degrees.
Sorry for the math, but I am cursed with the Engineer's mind...