Looks like you have a Milodon deep sump oil pan and Hotchkis front end parts. Every time I've put anything aftermarket on my Firebird there has been a fitment and/or operational issue. Most of the front end stuff is made for Camaros and listed for Firebird. One size fits none.
I have to agree (X2) on what Bluebird said! Seems like every time I put anything that fits a Firebird but also a Camaro, something is wrong with it, latest being the hood hinges that are supposed to fit Chevy/Pontiac!!