I tried a drop in CV pump in my car for street driving and it worked very well in town or drag racing but as soon as I got on the high way cruising at 70 mph coolant temperature went to 220.
Now while that isn't fatal for a big block it can lead to detonation which is fatal. I have since read Andy's books and put a more stock type cooling system on my car with factory pulleys and a 5 blade clutch fan and now I can drive anywhere all day and the plus side is it also works perfect on the dragway as well
Gus