I've got a 1992 Firebird and I'm half way done with a nice project. I've ripped apart the entire top end, and I'm replacing it for better performance (duh). What's going in is an LT4 cam from a 96 Grand Sport Vette, a pair of Vortec L31 heads, an Edelbrock RPM Air Gap manifold, and a Holley 670cfm TBI. In fact, the new cam is already in. I'm just reassembling everything now. Should be good for 300 horsepower, which isn't bad for a daily driver.