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Originally Posted by rocketrod
How streetable is this motor with a "partial block fill"? Any overheating issues? Also does the motor have an aftermarket block?
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It is a factory 400 2 bolt block. The partial fill is something I've done on all three of these I've had. None had cooling issues. Almost required with the GM block and high hp.
This one never went over 180 degrees. I remember being stuck for a train on a 100+ degree day and we let it idle for the full 15 minutes it took for the super-slow moving train. It would hit 180 degrees, the computer turned the Mark VIII fan on and it would cool back to 170 degrees where the computer shut the fan off. This happened a few times, slowly building back up in temp while the fan was off. As soon as the fan started it didn't gain a single degree of temp, just headed back down.
Jody