I found an aftermarket 670cfm 2-bbl truck TBI, Do you think it will work for my 305 '92 Firebird?

If its the Holley one then yes it will, this topic comes up quite frequently around here, but since you are new, you probably dont know that.

most parts for our TBIs are actually meant for trucks...aftermarket parts i mean...the lo3 and lo5 are truck motors...anything that says TBI 5.0 will pretty much work without any mods...its the same motor and TBI as the trucks had

oh yeah and the more you mess with your car the more stuff youll realize doesnt need to be there my engine looks so much cleaner since i started ripping stuff off...i can easily get my passenger side valve cover off without moving anything becuase i took it all out...can you say that?

Thanks