One needn't boast an advanced degree in thermodynamics to understand that wedging a largish V-8 powerplant into a tight, poorly ventilated engine compartment is bound to pose cooling problems. And ...
In case some of you are a bit lost, try these examples out. Would you rather push around a push mower to mow the lawn, or hop on a riding mower? Now switch gears for a second and think about your car.