Hi Eddie, I used http://www.chevycool.com/ (Ron Burke out of Scottsdale, Az. at 1-480-720-8000) to re-build our water pump. He comes to Carlisle so I met him personally and he seems to be a good guy. NCRS member and advertises in drive-line. I found a long time ago if the Corvette gang is overall happy with a re-builder/restorer you have an excellent chance of success. But there are others for sure. Always heard good things about Arthur Gould as well with a long history but not sure if he retired or still re-building.
X2! good guy to deal with