Anyone here rebuilding an LT1?
If so, you might be interested in this Herron Performance Exclusive

https://securehost98.hrwebservices.net/~herronp/store/images/uploads/Compare%20stock%20vs%20new.jpg

The LT1 Billet Oil Pump drive is used in many applications to replace the factory plastic unit.

Installation instructions (http://www.herronperformance.com/html/billet_oil_drive.html)

$150 shipped for the housing.
If you want a complete unit we can discuss options.