Building A High Performance Boss Mustang 409 Engine - Big Boss Buildup

Scott stresses piston design and its effect on power. He believes in reducing reciprocating mass, weight, and friction to free up power. This is a dished lightweight piston for greater displacement small-blocks. The crown is coated to protect the piston and pin. Coated skirts reduce friction.

Internal friction and weight can be found in connecting rods, too. Scott finds hidden power in smaller pins and journals because there's less friction and weight. This is a nice piece Scott used in the Boss 409-also available to MPG customers seeking big power gains.

Here's the 351W-based Dart block with four-bolt mains, siamesed 4-inch bores, thick walls, and more. If you want displacement upward of 490 ci, this is the platform for you. Imagine-big-block displacement in a small-block V-8.