Included with 428 SCJ were cast pistons, a nodular controlled cast-iron crankshaft casting 1UA or 1UA B with an external weight on the snout behind the balancer, 427 (LeMans) capscrew connecting rods, an engine oil cooler, and either a 9 inches rear axle with 3.91:1 gears and a Traction-Lock limited slip or 4.30:1 gears with a Detroit Locker.