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Flying F-150: Rob Machren’s Pro-4 CORR truck was on display fresh from winning the CORR championship. With so much trick stuff on the hand-built truck it is hard know where to start. Power is provided by a 825hp 455ci V-8 that produces 690 lb-ft of torque flowing through a C6 trans, modified Borg Warner 1354 TOD transfer case. Up front, a Ford 9-inch center section sends power through Porsche 934 CVs to a double A-arm suspension with 17 inches of wheel travel. In the rear, a Chrisman-built rear housing sporting 23/4-inch-diameter axleshafts is suspended by a four-link suspension that provides 19 inches of wheel travel.