The 440 would run with the temp gauge topped out in the Central Valley of CA., so I replaced with a 26" 3 row Brass type; I sawed the opening wider and hammered the bottom protector down, but it still got hot, then installed a Milodon High Volume Aluminum pump, not as hot but still middle of the gauge. The thermostat was 160* and was the old big brass type, I then found the Mr.Gasket High Perf. 180* with a larger copper pellet and the old style brass housing, so for an experiment I tried it and the gauge now runs at the first line. Conclusion: without the High Perf. thermostat the other upgrades are marginal. Also, I tried the thermostat with a high volume pump on the other car's 340 with a small radiator, and now the gauge has dropped to the middle, a marginal improvement again, but good enough for the drags since they are over quickly and it would otherwise take too long to warm up.