are they really that good? do they keep the motor that much cooler than stock? anyone check temps before and after?
I know they have the later impeller design, but their benefit is really in the bearings & seals. They use roller bearings like the truck pumps & ceramic seals - fewer leaks. Don't know that they cool that much better, but if you're buying new pumps, you won't find the old-tech pumps much cheaper...
To add to Ernie's observations, they're the only pumps you can use if you are using early pumps on a late (8BA) block as they have sealed bearings and the 8BA blocks have no provisions for oil supply to the bushing-fitted stock early pumps. Regards, Dave
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