Lets say its 1971, and I wanted to build a 360...

If you're doing a period rat rod - then tunnel rams and headers were not typically used. It might have an intake with a Holley or a factory intake with an adaptor and Holley, home-made headers, and some glass packs - either Thrush (red) or Purple Hornies. Chances are it would be manifolds, points ignition, no chrome except maybe the air cleaner which would have some rust on it (swap meet special). If you want a rat rod - make EVERYTHING yourself.