79 305 into 91 firebird
 

So this is my first real project, so I'm new to everything and and open to learning everything I can, and I thought I saw a post on this before but I can't seem to find it. I've got a 1991 firebird used to be a fuel injected 305, electronics, sensors and all that are still in it, the guy I bought it from put a rebuilt 79 305 block in it, and converted to carb, I'm not sure if the headers are from the 91 or not, but the bracket arms, braces, for the accessory brackets don't make much sense to me, I'm probably lining them up wrong but, would anyone be able to tell me or better, show me where each one goes or if I have to swap headers or am missing stud bolts or something?