360 LA Truck Exhaust Manifolds

I don't get it. I posted a similar question (What stock exhaust header will fit?) on this forum on 2/2/11 and got no responses. My engine is a 318, but the heads are 360 and all these small block LAs are about the same, aren't they? There must be a stock header that fits around the power steering box. Anybody got a pic or the right casting number? The one I found in the wrecking yard has the number 2780945 on it and it exits at the rear between the 3rd and 4th cylinders. It just doesn't quite clear the steering. Must be for standard steering.