In the “Zurvanite” accounts of the beginnings, we also find speculations about Ohrmazd and his mother. Thus, in the Syriac Acts of Āḏurhormizd and Anāhīḏ , the author polemizes against the story he has heard that Ohrmazd’s intercourse with his mother produced the sun, dogs, pigs, asses, and cattle (ed. Bedjan, II, 1891, p. 36; cf. Nöldeke; de Menasce, 1938, p. 594; Zaehner, pp. 435-36). In the Arabic work on the true religion by the Syrian Christian Arab Abu Qorra (755-after 829), in the chapter on the majus , Magi (pp. 201-3), Zurvan is said to have had a wife, and, on the advice of the devil, Ohrmazd sired the sun with his mother and then the moon with his sister, providing a model for humans (de Menasce, 1938, p. 601; Abu Qorra, p. 202, sec. 15).
Test 2 reveals what happens when this Rat is aerobicised with a set of headers. As you can see from the dyno chart, headers are probably the single most important component you could bolt onto the big-block to enhance performance. This is especially important since the rectangle-port big-block heads are not known for their excellent exhaust-port flow, so any improvement on the exhaust side will do wonders to unlock power. This boosted torque from 450 lb-ft to a solid 500 lb-ft. Better yet, the entire torque curve improved. Even at 2,400 rpm, the torque was up an amazing 35 lb-ft over the iron manifolds.