You'll need to remove the pump for that. I never had to do it but maybe one of the other LT-1 guys has.

Jim;
I have a waterpump seal leaking on my 98 w/LT1. From the looks of it, the engine circulation pump is camshaft driven?
What's the best way to replace that seal. Can it be done by removing the front watrepump cover, or do i have to take off the whole pump and reseal that way?

thanks,
EricB