In october edition of Motor Trend, they tested a 289 cobra, a 427, and a series 1. What I was curious about, is where they got the engine for the 427. Shelby doesn't sell an engine for it, so where did this 30 000 aluminum ford v-8 come from. All they said was: "aftermarket drivetrains for this chassisrun from about 8000 for a 351 v-8, to 30 000 for a built aluminum 427. " Did they get this motor through Shelby American?