heads... exhaust... intake

If you posted this 5 years ago, you'd get "run them, they will work fine". I've bolted them on and added a cam and they worked fine to me. I dont think any 360 manifolds will fit an A body. They dump right at the steering shaft I think. If I had to do them same stuff over again, I would spend the money on the right cam and matching components, and cheap headers for that 318. Even by not having to bvuy head gaskets and the associated gaskets needed, you can buy cheap headers that will make a feelable difference with any cam or intake. I'm also thinking you already have a dual exhaust. If you dont, that is job 1.