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With the manifold portion of our test complete, we moved on to tubeheaders. First was a set of Hedman shorties with a tube diameter of 15/8inches. The shorties bolted up to the block nicely. However, in the '70A-Body Duster we once tried them in, the collector exit was too close tothe steering drag link to connect effectively. We haven't tried to fitthem in other chassis types. The shorties did provide a good powerincrease when compared to all of the iron manifolds tested, recording322 hp at 4,700 rpm and 416.7 lb-ft of torque. Spark-plug wire clearancewas also good.