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Kas McManus'73 Challenger (371 hp)If you're a frequent reader, you'll probably recognize Kas McManus' '73 Challenger from last December's cover. (A) Last year, Kas made an impressive 294 hp at 6,300 rpm and 322 lbs-ft at 3,250 rpm, using a .030-over 340 with 11.0:1 pistons, an Ultradyne mechanical cam, mildly ported heads, and an 850 Holley carb atop a Victor 340 intake and a 2-inch exhaust. (B) This year, Kas had a little more meat on the plate. He started with a pair of Edelbrock aluminum heads prepped by Indy Cylinder Heads, a ported Victor intake, and an AED-prepped 850 double-pumper carb. As if that wasn't enough, he also added a NOS cheater system and 3-inch exhaust. Without the spray, he turned in a solid 318 hp at 6,800 rpm and 310 lbs-ft at 6,800 rpm. With the spray turned on, the Dodge screamed to a big 371 hp at 6,100 rpm and 348 lbs-ft at 6,000 rpm and should get even more with increased jetting. All in all, one radical street machine.