Quote:
Originally Posted by truckster
...Overheating with the 400s is misunderstood by a lot of people. The 400 isn't any more likely to overheat than a 350 or any other SBC. The 400 is less tolerant of overheating than other SBCs, if it does overheat, because of thinner walls in the castings...
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There ya go! Heck,has no one ever roached a 350? I believe a 400 can run cooler,if anything,when driving along normal (who does that,right?) due to the torque they make and less throttle demanded. They work effortlessly where a 350 needs a slight push. They are great in the trucks. GM should have offered these. I had a stock one in a K/20 and it was an ideal motor. It got 12.5 mpg with 4.10s and 12.50/35 rubber. Never broke a sweat.