Do a search; this has been hashed over many times. You DO NOT have to move the steering box and you DO NOT have to offset the engine with a 265 exhaust manifold. If you do you did something wrong. For a good pictorial go to Kahoys post on 9-26-2015. He did it right.
I found it. Now is there a header i can get better flow with and still not modify the steer gear box relocation? Will that 265 header work on my SBC 305?