Fel Pro 1213

Here's what I found regarding temperatures between unblocked and blocked manifold heat:
Unblocked Blocked Blocked
180 Thermostat 180 Thermostat 160 Thermostat
Ambient test temp: 88 88 84
Carb bowl: 145 130 132
Intake manifold (just below carb,
at exhaust crossover): 250 192 183
Top of radiator: 187 188 195
Water temp: 200 200 190

Temperatures were taken with an infrared tester, after a 30 minute ride, so as to thoroughly heat the engine. The coolant was 50/50 distilled water and antifreeze.

EDIT: I made separate columns, when I posted, the forum jumbled them up. I hope they're readable.