Another interesting and confusing problem I had produced the exact same heating problems that you are having. My cause was that my battery shifted over next to the overflow hose and partially pinched it off. Within 2 mins. the temp would shoot to 220-230. I noticed the pinch and positioned the battery correctly, and the temp went to normal.
It happened 2 more times before I finally got the battery hold down fixed, then never again. You're situation is not exactly the same, but without a correct overflow setup, it is similar. Id get it exactly to the original factory setup.
BTW, I'm about 20 min up the 5 from you here in Mission Viejo. Let me know if you need any help. OOH-RAH
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1987 black with t-tops. Cobra intake, 1.7 cobra crane rollers, gt40p's, bbk shorties, off road h-pipe, Holley adj. fuel pressure regulator, Tremec t-5z, 65mm TB, 4.10's, adj cable, 155lph fuel pump, Ram clutch kit, 3 row motorsport radiator,
Chrome cobras17x9 front, 17x10.5 rear, Hurst shifter,Former AOD Semper Fi
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