What size is the pulley on your water pump? Small diameter equals most coolant flow. Also, your coolant flow is a sum of 3 different flow paths: recirc, heater core, and radiator. Recirc is determined by the size of the hole from the intake to the timing cover. Heater core flow can be modulated by a heater control valve, etc. The radiator gets everything else, modulated by the thermostat.
I've become highly suspect of regular thermostats not allowing enough flow because they don't open far enough. I found that when I took my tstat out, I recovered a significant amount more cooling capacity. When I reinstall a thermostat, it will either be a high flow, OR I will drill holes in a standard tstat to allow more flow area.
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"...ridge reamer and ring compressor? Do they have tools like that?"
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